Podcasts about Volcanism

fWotD Episode 2810: Volcanism of the Mount Edziza volcanic complex Welcome to Featured Wiki of the Day, your daily dose of knowledge from Wikipedia’s finest articles.The featured article for Monday, 13 January 2025 is Volcanism of the Mount Edziza volcanic complex.The Mount Edziza volcanic complex (MEVC) in British Columbia, Canada, has a history of volcanism that spans more than 7 million years. It has taken place during five cycles of magmatic activity, each producing less volcanic material than the previous one. Volcanism during these cycles has created several types of volcanoes, including cinder cones, stratovolcanoes, subglacial volcanoes, shield volcanoes and lava domes. The roughly 1,000-square-kilometre (400-square-mile) volcanic plateau forming the base of the MEVC originated from the successive eruptions of highly mobile lava flows. Volcanic rocks such as basalt, trachybasalt, benmoreite, tristanite, mugearite, trachyte and rhyolite were deposited by multiple eruptions of the MEVC; the latter six rock types are products of varying degrees of magmatic differentiation in underground magma reservoirs. At least 10 distinct flows of obsidian were produced by volcanism of the MEVC, some of which were exploited by indigenous peoples in prehistoric times to make tools and weaponry. Renewed effusive volcanism could block local streams with lava flows whereas renewed explosive volcanism could disrupt air traffic with volcanic ash across parts of northwestern Canada.The first magmatic cycle took place between 7.5 and 6 million years ago and is represented by the Raspberry, Little Iskut and Armadillo geological formations, each of which is the product of a different eruptive period. Three distinct periods of eruptive activity also characterized the second magmatic cycle between 6 and 1 million years ago; they are represented by the Nido, Spectrum and Pyramid geological formations. The third magmatic cycle about 1 million years ago is represented by the Ice Peak, Pillow Ridge and Edziza geological formations, each of which is also the product of a distinct eruptive period. Three distinct periods of eruptive activity also characterized the fourth magmatic cycle between 0.8 and 0.2 million years ago which are represented by the Arctic Lake, Klastline and Kakiddi geological formations. The fifth magmatic cycle began at least 20,000 years ago and may be ongoing; the single distinct eruptive period of this magmatic cycle is represented by the Big Raven Formation.This recording reflects the Wikipedia text as of 04:37 UTC on Monday, 13 January 2025.For the full current version of the article, see Volcanism of the Mount Edziza volcanic complex on Wikipedia.This podcast uses content from Wikipedia under the Creative Commons Attribution-ShareAlike License.Visit our archives at wikioftheday.com and subscribe to stay updated on new episodes.Follow us on Mastodon at @wikioftheday@masto.ai.Also check out Curmudgeon's Corner, a current events podcast.Until next time, I'm standard Raveena.

Juno uncovers Io's volcanic mysteries.

SpaceTime Series 27 Episode 157NASA's Parker Solar Probe Touches the SunNASA's Parker Solar Probe has made history by becoming the first spacecraft to touch the Sun. The probe, weighing 685 kilogrammes, flew within 6.1 million kilometres of the solar surface, achieving unprecedented speeds of over 692 kilometres per hour. This milestone marks a significant step in understanding solar phenomena and space weather, with implications for forecasting geomagnetic storms.Moon's Volcanic Past UnveiledNew samples from China's Chang'e 6 mission to the Moon's far side reveal volcanic activity as recent as 2.8 billion years ago. This finding challenges previous assumptions about the Moon's geological history, suggesting a prolonged period of volcanism on its far side, distinct from earlier samples obtained from the near side.Mapping the Milky WayAstronomers have crafted a new stellar chart offering a more comprehensive map of our Milky Way galaxy. The study reveals the galaxy's formation in two distinct phases, with implications for understanding its structure and evolution. This research provides new insights into areas previously hidden from view.00:00 This is space Time Series 27 episode 157 for broadcast on 30 December 202400:47 NASA's Parker Solar Probe flew closer to the sun than any other spacecraft02:05 NASA launched Parker solar probe to touch the Sun in August 201810:04 New data from China's Chang'e 6 mission suggests lunar volcanism still active13:09 Astronomers develop new stellar chart providing a more complete map of our Milky Way galaxy16:45 New study claims drinking tea or coffee reduces risk of head and neck cancers18:46 Scientists at Monash University have made a breakthrough in energy storage technology20:57 Consumer magazine Choice has announced its shonky award winners for 2024www.spacetimewithstuartgary.comwww.bitesz.com

SpaceTime Series 27 Episode 154*The Moon's Age: A New PerspectiveNew research suggests the Moon may be much older than previously believed. Evidence indicates the Moon's crust underwent extensive remelting around 4.35 billion years ago, obscuring its true age. This study proposes the Moon could be as old as 4.53 billion years, challenging past estimates and offering a new understanding of its formation.*Perseverance Rover's New HorizonsNASA's Perseverance rover has reached the top of Jezero Crater's rim, marking a significant milestone in its mission. With the climb complete, the rover is set to explore new geological terrains, potentially uncovering some of the oldest rocks in the solar system. This new phase promises to deepen our understanding of Mars' ancient history.*Unveiling South Australia's Pink Sands MysteryThe discovery of deep pink sands on South Australian beaches has provided insights into the tectonic history of the region. These findings, published in Communications Earth and Environment, suggest the existence of an ancient Antarctic mountain range, offering clues about the geological past of the supercontinent Gondwana.00:00 This is space Time Series 27, Episode 154 for broadcast on 23 December 202400:47 New research suggests Earth's moon may be an awful lot older than previously thought07:05 NASA's Mars Perseverance Rover has completed its long climb to summit10:51 Deep pink sands washing up on South Australian beaches reveal previously unknown mountain range19:05 Garnets are a metamorphic mineral which grows when deep in crust20:51 Ambulance and taxi drivers have lowest death rate from Alzheimer's22:57 New study finds men are quicker to buy drinks when women are scarcewww.spacetimewithstuartgary.comwww.bitesz.com

SpaceTime Series 27 Episode 125*Discovery of the Most Distant Spiral GalaxyAstronomers have identified the most distant spiral galaxy ever seen, named REBELS 25. This galaxy, observed as it was 13.1 billion years ago, challenges current models of galaxy formation with its orderly spiral structure, despite being from an era when the universe was just 700 million years old. The discovery, made using the ALMA radio telescope in Chile, offers new insights into the early universe and the evolution of galaxies.*Record-Breaking Mantle Rock RecoveryScientists have achieved a groundbreaking recovery of rocks from Earth's mantle, the planet's largest component. The 1268-meter-long section of mantle rock, retrieved from the Atlantic's mid-ocean ridge, provides new insights into the mantle's role in Earth's geological processes. The findings, published in Science, reveal unexpected levels of melting and composition, offering clues to the origins of life and volcanic activity.*Launch of ESA's Hera Asteroid MissionThe European Space Agency's Hera mission has launched from Cape Canaveral, just ahead of Hurricane Milton. Hera will conduct a detailed study of the Didymos asteroid system, following NASA's successful Dart mission. The mission aims to enhance our understanding of asteroid deflection techniques, which could be crucial for planetary defense.The Science ReportA new, highly transmissible Covid-19 variant, XEC, has been detected in Australia. The variant, a recombinant of two Omicron subvariants, is spreading rapidly and has been reported in 29 countries.A consumer advocacy group reveals that car manufacturers are collecting and sharing extensive data from vehicles, raising privacy concerns.A study finds that deactivating Facebook can improve well-being but may reduce political knowledge.AMD's new AI chips set new standards for processing speed, outperforming competitors with their advanced capabilities.www.spacetimewithstuartgary.comwww.bitesz.com

In today's episode, we explore the latest discoveries in lunar volcanism, the unique phenomena awaiting astronauts at the moon's south pole, and the arrival of a new crew at the International Space Station. Join us for an in-depth look at these exciting developments in Space exploration!*Recent volcanism on discovered on the Moon Scientists have discovered evidence of volcanism on the lunar surface as recently as 125 million years ago. *The Strange phenomena people will see at Moon's south pole When astronauts return to the Moon's surface as part of the Artemis 3 mission to the Lunar south pole, they'll experience a very different environment to that which the Apollo astronauts witnessed more than half a century ago. *A new crew arrives at the International Space Station The Russian Soyuz MS-26 capsule has successfully docked with the International Space station just three hours after its launch aboard a Soyuz 2.1a rocket from the Baikonur Cosmodrome in in the central Asian republic of Kazakhstan. *The Science Report Study shows up to 19% of dementia cases could be linked to vision problems. Over 52 million tonnes of plastic dumped into the environment every year. The growing amount of incorrect AI generated data being generated. Alex on Tech: are the new iPhone 16s worth it?  www.spacetimewithstuartgary.comwww.bitesz.comBecome a supporter of this podcast: https://www.spreaker.com/podcast/spacetime-with-stuart-gary--2458531/support.

Join us for SpaceTime Series 27 Episode 68, where we explore the latest cosmic discoveries and technological advancements shaping our understanding of the universe.First, we uncover new evidence suggesting that Venus is volcanically active. By analysing data from NASA's Magellan radar, scientists have identified two volcanoes on Venus that erupted in the early 1990s. This discovery adds to the growing body of evidence that Venus may be far more volcanically active than previously thought.Next, we discuss the discovery of a new kind of volcanic eruption on Earth. Researchers have identified a unique eruption mechanism at Hawaii's Kilauea volcano, describing it as a "stomp rocket" eruption driven by sudden pressure increases as the ground collapses.Finally, we look forward to the maiden flight of the European Space Agency's new Ariane 6 rocket, now slated for next month. This launch marks a significant milestone in Europe's space exploration capabilities.00:00 This is spacetime series 27, episode 68 for broadcast on 5 June 202400:45 Two volcanoes on Venus appear to have erupted in the early 1990s05:40 Venus is often considered to be earths sister planet with runaway greenhouse effect09:47 Scientists say Kilauea volcano erupted like a stomp rocket in 201814:05 The maiden flight of the European Space Agency's new Ariane six rocket now likely19:19 The upper and main stages of the Ariane six flight model have arrived22:03 New study says vaccines for bird flu are best defence if virus spreads between humans24:03 Study finds popular teens sleep 27 minutes less per night than their peers25:57 There are growing concerns about inaccurate information coming out of artificial intelligence programmes26:41 Google's AI overviews are giving very strange information based on Reddit posts27:45 Sam Altman has rushed to form a new AI safety team31:03 Spacetime is available every Monday, Wednesday and Friday Follow our cosmic conversations on X @stuartgary, Instagram, YouTube, and Facebook. Join us as we unravel the mysteries of the universe, one episode at a time.Sponsor OfferThis episode is proudly supported by NordPass. Secure your digital journey across the cosmos with a password manager you can trust. Find your stellar security solution at https://www.bitesz.com/nordpass.Listen to SpaceTime on your favourite podcast app including Apple Podcasts, Spotify, YouTube Music, or wherever you get your podcasts.Support SpaceTimeBecome a supporter of SpaceTime:If you'd like to support SpaceTime and access early release episodes, commercial-free...then look for us on Patreon or Supercast. Links on our website at spacetimewithstuart.com https://www.bitesz.com/show/spacetime/support/www.bitesz.com

This is another of our series of conversations on intellectual humility and historical thinking.  With me today is Joseph Manning. He is the William K. and Marilyn Milton Simpson Professor of Classics and History, Professor in the Yale School of the Environment, and Senior Research Scholar in Law.  Manning has a specialized historical focus on Hellenistic history, with particular focus on the legal and economic history of Ptolemaic Egypt. His research focus over the last ten years has concentrated on historical climate change and its impact on premodern societies more widely. He is the principal investigator of the US National Science foundation project:  “Volcanism, Hydrology and Social Conflict: Lessons from Hellenistic and Roman-Era Egypt and Mesopotamia.” He is also on the editorial boards of Studia Hellenistica (Leuven) and the Palgrave Studies in Ancient Economies. He has coedited several volumes, and is the author of numerous monographs, the most recent of which is The Open Sea: The Economic Life of the Ancient Mediterranean World from the Iron Age to the Rise of Rome (Princeton University Press, 2018), which was the subject of a conversation in Episode 164 of Historically Thinking. He is now at work on a major new work on historic climate change and its impact since the last Ice Age.

Kurt Streutker is a retired school teacher who taught life, earth and physical sciences. He has a Master's Degree and focused his studies in Geology and specifically in the study of the Ice Ages. He has a keen understanding of how and why climate changes and the environmental science of climate changes / global warming. There is so much information that is censored to the general public regarding climate change and you may be surprised how much the world has be brainwashed. 00:00 Introduction to the Climate Change Dialogue 01:06 Demystifying Climate Science: A Layman's Perspective 03:09 The Role of Carbon Dioxide and Greenhouse Gases Explained 04:39 Addressing Climate Change Misconceptions 22:06 The Impact of Volcanic Activity on Climate 23:53 Exploring the Effects of Volcanism on Earth's Climate 27:39 A Closer Look at Volcanoes and Their Influence on Climate 30:09 Mount St. Helens: A Case Study in Volcanic Impact 32:24 Exploring the Aftermath of Volcanic Eruptions 33:07 Mount St. Helens: A Case Study in Geological Impact 33:46 The Tonga Eruption: Water Vapor and Climate Effects 36:43 Understanding Ice Ages: Causes and Climate Dynamics 38:33 Hawaii's Role in the Great Ice Age Hypothesis 44:34 Geological Wonders: From Hawaii to Meteora 50:13 Debunking Climate Change Myths 55:51 Exposing the Climate Change Scam: A Closer Look 59:38 Empirical Science vs. Climate Alarmism 01:02:55 Final Thoughts and Q&A Invitation     https://twitter.com/ClimateCha29965 ========= AI summaries of all of my podcasts: https://tomn.substack.com/p/podcast-summaries About Tom Nelson: https://linktr.ee/tomanelson1 YouTube: https://www.youtube.com/playlist?list=PL89cj_OtPeenLkWMmdwcT8Dt0DGMb8RGR Twitter: https://twitter.com/TomANelson Substack: https://tomn.substack.com/ About Tom: https://tomn.substack.com/about

**Hosts:** Anna and the Astronomy Daily Team---**Episode Summary:**Embark on a cosmic expedition with Anna and the Astronomy Daily Team as we navigate through the latest astronomical discoveries and the challenges of space exploration. In this episode, we dive into the icy mysteries of Jupiter's moon Europa, unearth the secrets of ancient Martian rivers, and spotlight NASA's lunar ambitions. We also confront the growing concern of space debris and the thrilling possibility of detecting volcanic activity on distant exoplanets. Join us for a captivating journey that brings the wonders of the universe into sharper focus and closer to our earthly realm.---**Featured Topics:**1. **Europa Clipper's Icy Odyssey:** Gear up for an inside look at NASA's Europa Clipper as it prepares for a groundbreaking journey to Jupiter's moon, seeking signs of life beneath its frozen crust.2. **Martian Rivers Revisited:** Traverse the dry riverbeds of Mars with NASA's Curiosity rover, piecing together the planet's watery past and the enigmatic history etched into its landscape.3. **Lunar Rovers Ready to Roll:** Discover how the Artemis program's lunar terrain vehicles will redefine moon exploration, offering astronauts unprecedented freedom and autonomy on the lunar surface.4. **The Fallout of Space Debris:** Reflect on the tangible impact of space debris as we examine a close call in Florida, highlighting the urgency for innovative solutions to clean up our orbital backyard.5. **Volcanoes in the Stars:** Peer into the potential of detecting volcanic activity on exoplanets, a pursuit that could reshape our understanding of geological processes in alien worlds.---**Additional Information:**For those yearning for more celestial content, navigate to astronomydaily.io to explore in-depth articles, revisit past episodes, and subscribe to our newsletter for your daily dose of the cosmos. Engage with our stargazing community by following @astrodailypod on X and join the conversation that spans the universe.---**Closing Remarks:**As we conclude today's stellar exploration, we thank you for your companionship on this interstellar voyage. The cosmos is vast and ever-evolving, and together, we'll continue to uncover its marvels. Until our next celestial encounter, this is Anna, wishing you clear skies and a heart full of wonder. Keep looking up, for the universe beckons.---**Host Sign-off:** Anna: "Thank you for tuning into Astronomy Daily. Until we traverse the stars together again, this is Anna, signing off. Dream big, fellow stargazers!For more visit www.astronomydaily.io---

Episode 499 of the A Minute to Midnite Show. Tony is joined by Ralph Strean, producer and director of “The Ark and the Darkness” film. Ralph explains some very important discoveries that show we have all been lied to by mainstream science. Unearthing the Mysteries of Noah's Flood. Ancient history, volcanism, the fossil record—all of these and more converge on one simple point: Noah's Flood actually happened. 

Listen to Future Now 2.6.2024 We recorded this show in the aftermath of a large west coast storm, and if you listened in realtime, you would have heard the numerous tech glitches that happened, including dropping off the air multiple times.  But for the podcast version you get to focus on what we found most fascinating this week, not the glitches. In Space News, for example, the PACE mission will dramatically improve our tracking of life and weather over the Earth’s oceans, and led to a conversation on how other creatures of this planet may also benefit from our planetary tech.  If you like glowy things, consider the first commerical glowing house plant, a petunia with a biolumenescent gene from  a South American mushroom!  If that is too silly for you, consider deploying bio-engineered bacteria that eat our waste plastic, a relatively low cost/low impact approach to cleaning up our polymer messes.  We also have fun looking at the new Short TakeOff and Landing aircraft under development, the the exciting new infrared NASA photos of Jupiter’s highly volcanic moon, IO.  Hot spots all over, enjoy! Light Bio’s bioluminescent petunia’s with mushroom glow genes

FDR 307 that covers EOD signs like Earthquakes, Volcanos, and Signs above. Luke 21 25:26 is our ref verses for the VCAST, 25 And there shall be signs in the sun, and in the moon, and in the stars; and upon the earth distress of nations, with perplexity; the sea and the waves roaring; 26 Men's hearts failing them for fear, and for looking after those things which are coming on the earth: for the powers of heaven shall be shaken. And Isaiah 24:19-20 19 The earth is utterly broken down, the earth is clean dissolved, the earth is moved exceedingly. 20 The earth shall reel to and fro like a drunkard, and shall be removed like a cottage; and the transgression thereof shall be heavy upon it; and it shall fall, and not rise again. According to the USGS, the global rate of “great” earthquakes (magnitude 8.0 or higher) increased by 265% in the last decade, compared to the previous century. According to the USGS, there are about 1,350 potentially active volcanoes worldwide, aside from the continuous belts of volcanoes on the ocean floor. About 500 of those 1,350 volcanoes have erupted in historical time. Weather Weapon Floods Examples Is rev 12 about weather weapons to flood out humans? 12 Therefore rejoice, ye heavens, and ye that dwell in them. Woe to the inhabiters of the earth and of the sea! for the devil is come down unto you, having great wrath, because he knoweth that he hath but a short time. 13 And when the dragon saw that he was cast unto the earth, he persecuted the woman which brought forth the man child.14 And to the woman were given two wings of a great eagle, that she might fly into the wilderness, into her place, where she is nourished for a time, and times, and half a time, from the face of the serpent.15 And the serpent cast out of his mouth water as a flood after the woman, that he might cause her to be carried away of the flood.16 And the earth helped the woman, and the earth opened her mouth, and swallowed up the flood which the dragon cast out of his mouth. Rev 12 Scripture about Volcanism and God's Power Psalm 97:5 - The hills melted like wax at the presence of the LORD, at the presence of the Lord of the whole earth. Psalm 104:32 - He looketh on the earth, and it trembleth: he toucheth the hills, and they smoke. Psalm 144:5 - Bow thy heavens, O LORD, and come down: touch the mountains, and they shall smoke. Deuteronomy 4:11 - And ye came near and stood under the mountain; and the mountain burned with fire unto the midst of heaven, with darkness, clouds, and thick darkness. Deuteronomy 5:23 - And it came to pass, when ye heard the voice out of the midst of the darkness, (for the mountain did burn with fire,) that ye came near unto me, even all the heads of your tribes, and your elders; Isaiah 64:1-3 - Oh that thou wouldest rend the heavens, that thou wouldest come down, that the mountains might flow down at thy presence, As when the melting fire burneth, the fire causeth the waters to boil, to make thy name known to thine adversaries, that the nations may tremble at thy presence! When thou didst terrible things which we looked not for, thou camest down, the mountains flowed down at thy presence. Micah 1:4 - And the mountains shall be molten under him, and the valleys shall be cleft, as wax before the fire, and as the waters that are poured down a steep place. Nahum 1:5-6 - The mountains quake at him, and the hills melt, and the earth is burned at his presence, yea, the world, and all that dwell therein. Who can stand before his indignation? and who can abide in the fierceness of his anger? his fury is poured out like fire, and the rocks are thrown down by him.

From Nov 21, 2023. Hosted by Dr. Franck Marchis. Up until now, the quest to find evidence of active volcanism on other worlds has been limited to our own solar system. We've definitively seen volcanoes erupting on Jupiter's moon, Io; we've possibly found evidence of geologically recent volcanism on Venus; and Mars has the largest volcano, although dormant, in Olympus Mons. With the advent of the JWST era, however, more possibilities have opened up. Colby Ostberg is an astronomer at UC Riverside and the lead author of an intriguing recent study on terrestrial exoplanet atmospheres and their potential volcanic activities, focusing on the direct imaging of such exoplanets.   Dr. Marchis and Colby discuss the results of the article, including the implication of volcanic activity on the color of an exoplanet and its atmospheric composition. Discover the future of exoplanetary science, where we're heading in our quest to understand these distant worlds, and how advances in technology and telescopic observations are bringing us closer to answers. (Recorded live on 5 October 2023.) Preprint of the paper: https://arxiv.org/abs/2309.15972   We've added a new way to donate to 365 Days of Astronomy to support editing, hosting, and production costs.  Just visit: https://www.patreon.com/365DaysOfAstronomy and donate as much as you can! Share the podcast with your friends and send the Patreon link to them too!  Every bit helps! Thank you! ------------------------------------ Do go visit http://www.redbubble.com/people/CosmoQuestX/shop for cool Astronomy Cast and CosmoQuest t-shirts, coffee mugs and other awesomeness! http://cosmoquest.org/Donate This show is made possible through your donations.  Thank you! (Haven't donated? It's not too late! Just click!) ------------------------------------ The 365 Days of Astronomy Podcast is produced by the Planetary Science Institute. http://www.psi.edu Visit us on the web at 365DaysOfAstronomy.org or email us at info@365DaysOfAstronomy.org.

The Space News Podcast.SpaceTime Series 26 Episode 155*Recent Martian volcanism reveals a more active planetA vast, flat, "featureless" plain on Mars has surprised scientists by revealing a much more tumultuous geologic past than expected. *Betelgeuse EclipsedSkywatchers were focused on the constellation Orion on December 12 as the asteroid 319 Leona passed in front of bright star Betelgeuse. *Hubble looks at a late-type galaxyOne of the great misconceptions in astronomy is the term late-type galaxies to describe galaxies of a specific shape. *The Science ReportResearch shows photographs of children's retinas can be used to test for autism.Murray River whale fossil shows how large baleen whales evolved.People still don't know how to check facts correctly on line. Alex on Tech: Intel joins the AI battleListen to SpaceTime on your favorite podcast app with our universal listen link: https://spacetimewithstuartgary.com/listen and access show links via https://linktr.ee/biteszHQ For more SpaceTime and show links: https://linktr.ee/biteszHQFor more podcasts visit our HQ at https://bitesz.com Your support is needed...**Support SpaceTime with Stuart Gary: Be Part of Our Cosmic Journey!** SpaceTime is fueled by passion, not big corporations or grants. We're on a mission to become 100% listener-supported, allowing us to focus solely on bringing you riveting space stories without the interruption of ads.

Up until now, the quest to find evidence of active volcanism on other worlds has been limited to our own solar system. We've definitively seen volcanoes erupting on Jupiter's moon, Io; we've possibly found evidence of geologically recent volcanism on Venus; and Mars has the largest volcano, although dormant, in Olympus Mons. With the advent of the JWST era, however, more possibilities have opened up. Colby Ostberg is an astronomer at UC Riverside and the lead author of an intriguing recent study on terrestrial exoplanet atmospheres and their potential volcanic activities, focusing on the direct imaging of such exoplanets. Dr. Franck Marchis and Colby discuss the results of the article, including the implication of volcanic activity on the color of an exoplanet and its atmospheric composition. Discover the future of exoplanetary science, where we're heading in our quest to understand these distant worlds, and how advances in technology and telescopic observations are bringing us closer to answers. (Recorded live on 5 October 2023.) Preprint of the paper: https://arxiv.org/abs/2309.15972

https://ui.adsabs.harvard.edu/abs/2018EGUGA..20..114D/abstract#:~:text=As%20to%20the%20activity%20of,St. https://scied.ucar.edu/learning-zone/how-climate-works/how-volcanoes-influence-climate #2023 #art #music #movies #poetry #poem #photooftheday #volcano #news #money #food #weather #climate #monkeys #horse #puppy #fyp #love #instagood #onelove #eyes #getyoked #horsie #gotmilk #book #shecomin #getready

Welcome to SpaceTime Series 26, Episode 91 with Stuart Gary. Today, we're exploring the intriguing geology of our celestial neighbors and our home planet. Discover how ancient asteroid impacts may have sparked ongoing volcanism on Venus, keeping its surface youthful despite the absence of plate tectonics. Speaking of plate tectonics, we delve into fresh evidence from a contentious debate regarding Earth's geologic history - new data suggesting our tectonic activity kicked off around 3.2 billion years ago. Next, journey with NASA's Juno spacecraft during its recent close encounter with Jupiter's volcanic moon, Io. As for our own planet, preliminary studies suggest July 2023 could be the hottest month ever recorded. We explore the worrying projections for the Gulf Stream, indicating a potential collapse by 2050 due to climate change. In health news, we question whether healthy individuals over 70 need a daily low-dose aspirin. And finally, for the skeptics out there, we discuss why cascading beer glasses do not constitute evidence of paranormal activity. Join us on this cosmic ride through space and time.#space #astronomy #science #news #spacetime #podcast

Iceland's geothermal energy is a boon to vegetable and fruit growers, whose produce would not be competitive without it. But the hot water is a finite resource.

Have we disproven the idea of a “goldilocks zone”? Neil deGrasse Tyson and comedian Paul Mecurio learn about space geology, magnetic fields, volcanoes, and the origins of life with cosmochemist Natalie Starkey, PhD.NOTE: StarTalk+ Patrons can listen to this entire episode commercial-free here: https://startalkmedia.com/show/cosmic-queries-volcanoes-life-in-the-universe/Thanks to our Patrons EmskyArt, Alex James, Mariette Kalinowski, Skye Lincoln, Matthew King, and James Senior for supporting us this week.Photo Credit: Boaworm, CC BY 3.0, via Wikimedia Commons

Compelling evidence for recent (1990's!) volcanic activity on Venus has been un-Earthed, or rather un-Venused, by Robert Herrick through analysis of Magellan radar data. A volcanic vent seems to have roughly doubled in size in 1991. We discuss the difficulties of these observations and the implications for future missions. We also take a look at the role of supermassive black holes in controlling star formation in galaxies and have a numerical Top quark trivia. Warning: this episode gets off to a bit of a silly start, so jump ahead to the 24-minute mark if you want to get straight to Venus!

Listen Now to Dr. Bruce Damer 12.05.2022 One of our science stories this week is about new discoveries of more recent volcanism on Mars, suggesting that a warmer climate there may have led to the creation of life there. We speak with evolutionary scientist Bruce Damer about the significance of these latest discoveries.  He also brings us up-to-date with his latest work with David Deamer and Francesca Carey, on the introduction of a new concept, ‘urability,’ a property of planets that can support the beginnings of life as we understand it. Bruce also speaks of his origin of life work at the Fly Hot Springs, a place we know, curiously, from visits to Burningman, and how AI can play a role in understanding our biological evolution. Enjoy!  

Getting into the depths of the Path of the Pole in our ongoing book report. We talk about volcanism and its possible role in drastically affecting climate during catastrophic crustal shift periods, causing all the glacial and interglacial periods we see evidence for in the recent glaciation.Hapgood also details evidence showing the timeline of the advance, retreat, and complete disappearance of the last ice age, and how this timeline is very short, meaning the disappearance of the ice cannot be explained by standard slow-moving geological processes.

①Chang'e-5 samples reveal how volcanism takes place on moon ②China's deep space exploration laboratory recruits young talents ③Beijing 2022 Winter Olympics watched by over two billion people: IOC ④Online sale of Beijing 2022 Winter Olympics mascot Bing DwenDwen to end on Dec. 31 ⑤UN body raises Latin America and the Caribbean growth forecasts in 2022 ⑥Whooper swans arrive in E China for winter ⑦Time to chill out and enjoy autumn's vibrant hues

Getting into the depths of the Path of the Pole in our ongoing book report. We talk about volcanism and its possible role in drastically affecting climate during catastrophic crustal shift periods, causing all the glacial and interglacial periods we see evidence for in the recent glaciation. Hapgood also details evidence showing the timeline of the advance, retreat, and complete disappearance of the last ice age, and how this timeline is very short, meaning the disappearance of the ice cannot be explained by standard slow-moving geological processes.   Get the book here: https://www.amazon.com/Path-Pole-Cataclysmic-Shift-Geology-ebook/dp/B003F7PEFG/ref=tmm_kin_swatch_0?_encoding=UTF8&qid=1662657062&sr=8-1   Executive Producers: Chandra Chell Philip Baklamov Matt Shy Peter Shell Zachariah Baker Associate Executive Producers: Chester Hunter Daniel Gandy Dave Cortes Patrick Hicks

*Tippecanoe and Tejas Too: Host Fred  Williams and special guest Doug McBurney review the latest Hydroplate Theory “Hit Piece” from Edward Isaacs via the Journal of Creation (#36). Find out where the author's assertions regarding volcanism in geologic mega sequences hit, where they miss, and why Fred says the Journal might even consider retracting it!

*Tippecanoe and Tejas Too: Host Fred  Williams and special guest Doug McBurney review the latest Hydroplate Theory “Hit Piece” from Edward Isaacs via the Journal of Creation (#36). Find out where the author's assertions regarding volcanism in geologic mega sequences hit, where they miss, and why Fred says the Journal might even consider retracting it!

Photo: No known restrictions on publication. @Batchelorshow #Venus: Indications of active volcanism. Bob Zimmerman BehindtheBlack.com https://behindtheblack.com/behind-the-black/points-of-information/more-evidence-of-recent-active-volcanism-on-venus/

The warming of the ocean has increased by 450%. Underwater eruptions are heating seawater, disrupting the normal circulation of the ocean, which is normally regulated by the sun. Volcanism is an underestimated natural cause. However united, real scientists can take science to the heavens and beyond.

Myvath is a shallow lake situated in an area of active Volcanism in the north of Iceland is highly recommended to visit

This week we are very pleased to welcome Megan Russell from the Planetary Science Institute to the WSH. Since starting at the Planetary Science Institute in March, Megan has gone from exploring volcanism on Venus to assisting in the search for ice on Mars. She is currently a Science Team Member and on the operations team for the Mars Reconnaissance Orbiter (MRO) Shallow Radar (SHARAD) experiment, and a System Analyst with the Colorado Shallow Radar Processing System (CO-SHARPS) team. Megan is also working on a Mars Subsurface Water Ice Mapping project. After completing her BSc in Space Science at York University, Megan moved to Vancouver to work at PhotoSat, an Earth remote sensing company, as a Project Manager/Satellite and GIS Data Consultant. She then completed her MSc in Geophysics/Planetary Science at UBC with Dr. Catherine L. Johnson and worked as a teaching assistant and research associate in the department. Megan's past research experience has involved delving into the world of volcanism on the planet Venus via geophysical investigations. She used observations collected from orbit during the Magellan mission (1990-1994) to help determine characteristics about the surface and subsurface, and tie this into the planet's evolution. To accomplish this, she used radar surface images, radar altimetry and high-resolution elevation maps created from stereo radar photos. You can learn more about Megan and her research by visiting her PSI website: https://www.psi.edu/about/staffpage/mrussell. **************************************** The Weekly Space Hangout is a production of CosmoQuest. Want to support CosmoQuest? Here are some specific ways you can help: ► Subscribe FREE to our YouTube channel at https://www.youtube.com/c/cosmoquest ► Subscribe to our podcasts Astronomy Cast and Daily Space where ever you get your podcasts! ► Watch our streams over on Twitch at https://www.twitch.tv/cosmoquestx – follow and subscribe! ► Become a Patreon of CosmoQuest https://www.patreon.com/cosmoquestx ► Become a Patreon of Astronomy Cast https://www.patreon.com/astronomycast ► Buy stuff from our Redbubble https://www.redbubble.com/people/cosmoquestx ► Join our Discord server for CosmoQuest - https://discord.gg/X8rw4vv ► Join the Weekly Space Hangout Crew! - http://www.wshcrew.space/ Don't forget to like and subscribe! Plus we love being shared out to new people, so tweet, comment, review us... all the free things you can do to help bring science into people's lives.

https://youtu.be/96apOh4FuSQ Host: Fraser Cain ( @fcain )Special Guest: This week we are very pleased to welcome Megan Russell ( @meguh78 ) from the Planetary Science Institute to the WSH.   Since starting at the Planetary Science Institute in March, Megan has gone from exploring volcanism on Venus to assisting in the search for ice on Mars. She is currently a Science Team Member and on the operations team for the Mars Reconnaissance Orbiter (MRO) Shallow Radar (SHARAD) experiment, and a System Analyst with the Colorado Shallow Radar Processing System (CO-SHARPS) team. Megan is also working on a Mars Subsurface Water Ice Mapping project.   After completing her BSc in Space Science at York University, Megan moved to Vancouver to work at PhotoSat, an Earth remote sensing company, as a Project Manager/Satellite and GIS Data Consultant. She then completed her MSc in Geophysics/Planetary Science at UBC with Dr. Catherine L. Johnson and worked as a teaching assistant and research associate in the department.   Megan's past research experience has involved delving into the world of volcanism on the planet Venus via geophysical investigations. She used observations collected from orbit during the Magellan mission (1990-1994) to help determine characteristics about the surface and subsurface, and tie this into the planet's evolution. To accomplish this, she used radar surface images, radar altimetry and high-resolution elevation maps created from stereo radar photos.   You can learn more about Megan and her research by visiting her PSI website:  https://https://www.psi.edu/about/staffpage/mrussell Regular Guests: Dr. Nick Castle ( @PlanetaryGeoDoc ) C.C. Petersen ( http://thespacewriter.com/wp/ & @AstroUniverse & @SpaceWriter ) This week's stories: - Mars is coming out of conjunction. - More information on Perseverance. - Water rules on Europa. - William Shatner flies to space. - LUCY launches! - Exoplanets discovered by their auroras! Yay LOFAR!   We've added a new way to donate to 365 Days of Astronomy to support editing, hosting, and production costs.  Just visit: https://www.patreon.com/365DaysOfAstronomy and donate as much as you can! Share the podcast with your friends and send the Patreon link to them too!  Every bit helps! Thank you! ------------------------------------ Do go visit http://www.redbubble.com/people/CosmoQuestX/shop for cool Astronomy Cast and CosmoQuest t-shirts, coffee mugs and other awesomeness! http://cosmoquest.org/Donate This show is made possible through your donations.  Thank you! (Haven't donated? It's not too late! Just click!) ------------------------------------ The 365 Days of Astronomy Podcast is produced by the Planetary Science Institute. http://www.psi.edu Visit us on the web at 365DaysOfAstronomy.org or email us at info@365DaysOfAstronomy.org.

Have you ever wondered how we can earn about the age of rocks and what that information can enlighten us on? By using the temperature and other strategies, we can gain a clearer picture of just what happened when these rocks were formed. Listen in to learn: The limitations of radiometric dating The sweet spot for dating a rock Why rain can interfere with the process Peter Copeland, a Professor of Geology and Thermochronology at the University of Houston, shares his work dating minerals and examining the thermochronology of rocks. Radiometric dating is one of the primary tools used to learn the history of the world we live on. By using isotopes of Potassium and Uranium, their half-lives can be examined to determine the date they were formed and what that reveals about the world at that time. Since half-lives are not obstructed by various factors faced by ancient samples of a rock or mineral, this strategy is the best possible method of study. While this is not the only way and the other primary method only requires a microscope, it remains one of the most accurate and reliable. https://www.uh.edu/nsm/earth-atmospheric/people/faculty/peter-copeland/ Episode also available on Apple Podcast: http://apple.co/30PvU9C

An analysis of the most recent sample taken from the Moon and returned by the Chang'e-5 mission shows that the basaltic rock is about two billions years old. This age implies a previously unknown heat source in the region. Plus, how plants and animals record climate change, and this week's What's Up.

Listen Now to Future News 5.18.2021 It looks like we have more evidence of possible life on Mars, given recent findings regarding fairly recent (

Gillian Foulger is a leading proponent of the plate hypothesis of volcanism, which posits that volcanism away from plate boundaries can be explained by extensional deformation of the lithosphere with melting of the upper mantle. The plate hypothesis uses plate tectonic theory to explain all volcanism without invoking plumes or hot-spots that originate in the lower mantle. She hosts a lively debate on whether mantle plumes exist at mantleplumes.org. Gillian Foulger is Emerita Professor of Geophysics at Durham University. A key prediction of the plate hypothesis is that the lithosphere should be extending wherever we see intra-plate volcanism. She explains that many of the observations we already have can be reinterpreted as consistent with the plate hypothesis, and suggests new experiments that could clearly distinguish the competing hypotheses. For podcast illustrations go to geologybites.com.

We talk with Davitia James, a volcanologist from the nature island of Dominica, about the Caribbeans' volcanic past and the current eruption taking place at the La Soufrière volcano in St. Vincent.

In this episode we discuss recently published papers about possible fluvial erosion on Venus and possible recent volcanic activity on Mars, as well as a recent Nature paper that caused a buzz on Twitter for its conclusions that female mentors are bad for the careers of their female protégées. 00:32 - Welcome & discussion on mentorships and gender 17:29 - Evidence of fluvial erosion on Venus 36:35 - Evidence of recent volcanism on Mars 1:43:08 - bonus content just for you Originally recorded November 25, 2020.

David Rothery investigates volcanism on Earth and elsewhere in the Solar System using remote-sensing Earth-orbiting satellites and space probes. Mercury is his present focus, and he is lead co-investigator for geology on the X-ray spectrometer aboard BepiColombo, an ESA mission currently on its way to Mercury. He describes some intriguing puzzles about Mercury that he hopes BepiColombo will resolve, as well as a type of volcanism occurring on some icy bodies in the outer solar system called cryovolcanism. Go to geologybites.com for illustrations supporting this podcast and to learn more about Geology Bites.

Listen Now to Future News 7.21.2020 In the first hour we catch you up on all the latest info on Covid-19, and translate what we’ve gleaned into a dialog you can have with you and your friends and family.  There is also lots of space news this week, especially with the launch of three major expeditions to Mars this month and new info on volcanism on our sister planet, Venus! Enjoy.. New 3D Map of Universe

Nick ponders why volcanoes erupt differently.

Nick addresses volcanic activity within tectonic plates.

Nick ponders why volcanoes erupt differently.

Nick addresses volcanic activity within tectonic plates.

Geology is a fundamental discipline to major biological concepts such as evolution and biogeography. Join me in a fascinating conversation with Geologist Andrew J. Meigs as he explains the geologic principles behind plate tectonics, volcanism, and mountain-building in the Pacific Northwest. Andrew is a Professor of Geology at Oregon State University.  Support this Podcast via Patreon here: https://www.patreon.com/northwestnaturematters Oregon Department of Geology and Mineral Industries: https://www.oregongeology.org/ Statewide Landslide Database: https://www.oregongeology.org/slido/index.htm

A study by the Lunar and Planetary Lab at the University of Arizona suggests that Mars could still be geologically alive. Researchers think a suspected lake beneath the south pole could only be kept liquid by a hot magma chamber. Internal heating raises the chance of finding underground life.

Brontosaurs, T-Rex, Asteroids, and Jurassic Park. We take Dinosaurs 101 with a first-time StarTalk All-Stars crew – science communicator and dino-nut Dustin Growick, comic co-host Meg Pierson, and paleontologist Shaena Montanari.Don't miss an episode of StarTalk All-Stars. Subscribe on: TuneIn: http://tunein.com/radio/StarTalk-All-Stars-p949405/ SoundCloud: https://soundcloud.com/startalk_all-stars Apple Podcasts: https://itun.es/us/P9kphb.c Stitcher: http://www.stitcher.com/podcast/startalk-allstars Google Play Music: https://play.google.com/music/listen#/ps/I2nz5bguurd5se7zu4fhnd25lk4NOTE: StarTalk All-Access subscribers can watch or listen to this entire episode commercial-free here: https://www.startalkradio.net/all-access/dinosaurs-101-with-dustin-growick/Image Credit: © Andrey Atuchin/DMNS 2017.

Brontosaurs, T-Rex, Asteroids, and Jurassic Park. We take Dinosaurs 101 with a first-time StarTalk All-Stars crew – science communicator and dino-nut Dustin Growick, comic co-host Meg Pierson, and paleontologist Shaena Montanari. Don’t miss an episode of StarTalk All-Stars. Subscribe on:  TuneIn: http://tunein.com/radio/StarTalk-All-Stars-p949405/  SoundCloud: https://soundcloud.com/startalk_all-stars    Apple Podcasts: https://itun.es/us/P9kphb.c    Stitcher: http://www.stitcher.com/podcast/startalk-allstars    Google Play Music: https://play.google.com/music/listen#/ps/I2nz5bguurd5se7zu4fhnd25lk4 NOTE: StarTalk All-Access subscribers can watch or listen to this entire episode commercial-free here: https://www.startalkradio.net/all-access/dinosaurs-101-with-dustin-growick/ Image Credit: © Andrey Atuchin/DMNS 2017.

Sep. 16, 2015. Lynnae Quick discussed her research on using analytical methods to model volcanic and cryo-volcanic processes on the terrestrial planets and the icy moons of the outer solar system. Speaker Biography: Lynnae Quick is a research scientist at NASA's Goddard Space Flight Center. For transcript, captions, and more information, visit http://www.loc.gov/today/cyberlc/feature_wdesc.php?rec=7279

The Great Ordovician Biodiversification Event, or 'GOBE', describes one of the most important increases in biodiversity in the history of life on earth. During a relatively short time span of some 25 million years, an explosion of new species, genera and families appeared. This increase in diversity was accompanied by an increase in ecosystem complexity. Plankton and suspension feeding organisms rapidly diversified and became important constituents of the food web. At the same time, large predators, such as the orthoconic nautiloids, evolved to exploit them. This biodiversity 'explosion' coincided with a dynamic period in earth's history during which continents were shifting, mountains were raised and massive volcanism occurred. Joining us to try and untangle the causes and consequences of this complex and fascinating period is Prof. David Harper of Durham University, UK.

Laetitia ROCHAT, doctorante FNS, Institut des sciences de la Terre

Laetitia ROCHAT, doctorante FNS, Institut des sciences de la Terre

Around 250 million years ago, at the end of the Permian geologic period, there was a mass extinction so severe that it remains the most traumatic known species die-off in Earth’s history. Although the cause of this event is a mystery, it has been speculated that the eruption of a large swath of volcanic rock in Russia called the Siberian Traps was a trigger for the extinction. New research from Carnegie’s Linda Elkins-Tanton and her co-authors offers insight into how this volcanism could have contributed to drastic deterioration in the global environment of the period.

Some of Britain’s most dramatic scenery is to be found in the Scottish Highlands. The sight of mighty Ben Nevis, the desolate plateau of the Cairngorms, or the imposing landscapes of Glen Coe can unleash the call of the wild in all of us. Although these landforms were largely carved by glacial activity that ended some 10,000 years ago, the rocks themselves tell of a much older history. The Highlands are merely eroded stumps of a much higher range of ancient mountains. This unit is an account of the origin and demise of that ancient mountain range, based on the geological evidence laid before us in rock exposures. This study unit is just one of many that can be found on LearningSpace, part of OpenLearn, a collection of open educational resources from The Open University. Published in ePub 2.0.1 format, some feature such as audio, video and linked PDF are not supported by all ePub readers.

Basalt, Icelands basic building block of the western rift zone

Transcript -- Basalt, Icelands basic building block of the western rift zone

Examining Icelands 1480AD fissure eruption.

Transcript -- Examining Icelands 1480AD fissure eruption.

Basalt, Icelands basic building block of the western rift zone

Transcript -- Basalt, Icelands basic building block of the western rift zone

Examining Icelands 1480AD fissure eruption.

Transcript -- Examining Icelands 1480AD fissure eruption.

Transcript -- The beautiful Greek Island of Santorini, the site of one of the largest volcanic eruptions known to humanity. Dr Steve Blake looks at the structures of the island's volcanic rocks.

The beautiful Greek Island of Santorini, the site of one of the largest volcanic eruptions known to humanity. Dr Steve Blake looks at the structures of the island's volcanic rocks.

Transcript -- The beautiful Greek Island of Santorini, the site of one of the largest volcanic eruptions known to humanity. Dr Steve Blake looks at the structures of the island's volcanic rocks.

The beautiful Greek Island of Santorini, the site of one of the largest volcanic eruptions known to humanity. Dr Steve Blake looks at the structures of the island's volcanic rocks.

Volcanic eruptions are one of the most spectacular and dangerous natural phenomena. Volcanic activity can either be effusive, dominated by quiescent emission of lava or explosive, dominated by the eruption of pyroclastic material. A rapid transition between these two regimes is possible. possible. On a broad scale, a clear distinction of the eruption style can be drawn by magma composition. Large-scale basaltic eruptions are mostly effusive, whereas large-scale silicic eruptions are mostly explosive. Thus silicic volcanism possesses a severe hazard potential and can have devastating effects on human population. This work comprises experimental investigations of the fragmentation behavior of porous magma as well as of the propagation of elastic waves within this material. The analyses were conducted on samples from Unzen Volcano, Japan as well as samples from Soufrière Hills Volcano, Montserrat, West Indies. The elastic wave velocities of differently porous Unzen dacite samples were investigated with the use of a cubic multi-anvil press. The main results of this study show that porosity (density) and texture affect the elastic properties of samples at a given temperature. In particular, it can be stated: (1) Seismic velocities increase with pressure due to compaction and closing of microcracks. The Vp anisotropy decreases with pressure for the same reason. (2) Increasing the temperature also leads to higher elastic wave velocities and lower anisotropies. This must be highlighted as the inverse behavior is documented for the majority of rocks. The effect may be linked to reduction of pore volume and further closing of microcracks due to reduction of cooling tensions. At 600 °C mean Vp values of 4.31 - 5.64 km/s and mean Vs* values of 2.20 - 3. 32 km/s could be determined. (3) The velocity anisotropy can be linked to the texture of the samples: Those with a high anisotropy show a pronounced shape-preferred orientation of phenocrysts and microcrystals, sometimes in addition to layering within the groundmass of the sample. Since the crystals are typically aligned parallel to walls of volcanic conduits, the velocity normal to the walls is likely to be reduced. The data allows better estimates of the properties of silicic volcanic rocks at shallow depths within volcanoes, e.g. at conduit walls. These estimates are vital for computation of conduit models as well as the modelling of volcano seismic data, and may lead to an improved analysis of precursor phenomena in volcanic areas. The physical properties of magma within volcanic conduits and domes are crucial for modelling eruptions. This study comprises a detailed investigation of the fragmentation behavior (threshold and propagation speed) of differently porous sets of dacitic and andesitic samples derived from Unzen Volcano, Japan and Soufrière Hills Volcano, Montserrat, West Indies. The experiments were performed with a shock-tube based fragmentation apparatus and pertain to the brittle fragmentation process. The results show a strong influence of the open porosity and the initial pressure on the fragmentation behavior. The speed of fragmentation follows a logarithmic relationship with the pressure difference, the fragmentation threshold an inversely proportional power-law relationship with increasing porosity. In this study fragmentation speed values ranging from 15 - 150 m/s were observed for applied pressure differences of up to 40 MPa and open porosities from 2.5 - 67.1 %. The expansion of the pressurized gas in the vesicles largely provides the energy driving the fragmentation process. The fragmentation speed results of all analyzed samples show a close relationship to the energy density (fragmentation energy standardized to volume). A logarithmical increase of the propagation speed was observed with the energy density as soon as the energy threshold of 2.0 x 0.5 J/m³ was exceeded. The fragmentation speed is independent from the origin and composition of the samples, proving the governing role of the energy to the initiation a propagation of fragmentation process. Different fragmentation mechanisms were discussed and the layer-by-layer fragmentation due to vesicle bursting is concluded to be the main process responsible for the disintegration of vesicular rocks. The increased importance of fracturing due to the passing of the unloading wave after a rapid decompression could be proved for low porous samples. Further the influence of the sample’s permeability on the fragmentation behavior was evaluated. It could be shown that a high permeability hinders the initiation of a fragmentation and reduces the propagation speed of this process at a certain energy density. The fragmentation results were applied to the dome collapse events and Vulcanian events of the 1990-1995 Unzen eruption and the 1997 Vulcanian events at Montserrat. Large blocks with layers of various porosity were observed at the block-and-ash flow deposits of Unzen Volcano and support the model that a dome and dome lobes consist of areas of differing porosity. In addition, the samples gained from Montserrat, allow to postulate a porosity gradient within a volcanic conduit, with low porous magma close to the conduit walls. A layered composition of a dome and dome lobes, respectively, may lead to the fragmentation of single layers, followed by the collapse of the overlaying sections. These events could catalyze gravitationally induced dome collapse events leading to vigorous pyroclastic flows and / or trigger a sector collapse followed by an Vulcanian event. A porosity gradient at the magma in the conduit leads to a concave shape of the fragmentation surface and facilitates lateral fragmentation of dense magma close to the conduit walls. Conduit implosion may to occur during most explosive eruptions and is likely to influence the cessation or pulsation of the eruption. The slow magma ascent and extrusion rate at Unzen resulted in relatively dense extruded magma, as the magma could almost completely degas during the ascent. The low porosity of this magma causes a high fragmentation threshold of most material, which is too high for unassisted fragmentation. Therefore dome collapse events were the most abundant events of the 1990-1995 activity of Unzen Volcano, leading to numerous block-and-ash flows. Also the fragmentation-amplified collapse of dome lobes or parts of the dome are reasonable. This accounts especially for the long lasting collapse events with vigorous pyroclastic flows at the early stage of the eruption in June 1991, which were followed by minor Vulcanian events. Nevertheless a larger explosive event would have been possible, triggered by a landslide or a sector collapse of the dome. Similarly to Unzen, the first phase of activity of the recent eruption of Montserrat is characterized by numerous dome collapse events leading to violent pyroclastic flows. As the magma extrusion rate was quite high during this phase, the extruded magma was higher vesiculated compared to the Unzen magma and thus a more violent evolution of the eruption activity took place. Large dome collapse events frequently caused Vulcanian events, and even two cycles of Vulcanian activity from August to September 1997 occurred. The calculations of the fragmentation depth, reached by this explosions yielded about 1500 m, based on the laboratory gained fragmentation speeds, which is in good agreement numerical models and observations. In silicic volcanic systems the conduit seems not to be sharply defined. The conduit walls are more to be seen as a kind of transition zone between a hot, ductile and vesicular magma within the conduit and the host rock. The rocks forming this transition zone are assumed to be quite hot, but presumably below glass transition and react therefore solely brittle. Furthermore these rocks should be quite dense, compared to magma in the conduit, and heavily fractured due to the high shear strains this zone is presumably exposed to. The transition zone is less likely affected by a fragmentation event. Their rocks (magma as well as host rocks) are too dense to fragment due to pore pressure. The needed pressure difference is unrealistically high, for example an overpressure of 18 MPa would be needed to initiate the fragmentation of rocks with a porosity of 7.5 %. Nevertheless this material may be found in the deposits of explosive events, due to processes like conduit wall erosion or as remnant of dense lenses within more porous areas. Indeed, also fragmentation may take place, the most likely process fragmenting even this dense material is by lateral fragmentation, which may occur from a certain depth on behind a fast propagating fragmentation of highly vesicular magma at the center of the conduit. The style and progression of an eruption is depending on the properties of this vesicular magma. If its fragmentation threshold can be exceeded, an explosive event may take place. Otherwise the magma is extruded quiescent in a dome forming eruption. The transition zone bears important implications on the one hand for the explosive event as a lateral fragmentation of a certain area may cause cessation or pulsation of the event, on the other hand for the propagation of seismic signals related to the eruption. Within this transition zone as well as the nearby host rock a decisive change of temperature and porosity can be supposed. This leads to a significant shift of the elastic wave velocities within this zone, sometimes resulting in trapped waves within this zone as observed for Montserrat. Especially the abnormal velocity increase with increasing temperatures has to be mentioned. Thus implications for an overall view of a volcanic system are provided in this study, with the transition zone as the common link. The properties of the elastic wave velocities account for the for host rock as well as the transition zone and bear vital constraints for the interpretation and modelling of volcano seismic data. The results of the fragmentation experiments are applicable for dome rocks, the vesicular interior of a conduit as well as the transition zone and contain important implications for the modelling of conduit processes. Together the results of this study may contribute to a refined understanding of processes typical for silicic volcanism. This may allow an improved analysis of precursor phenomena in volcanic areas and consequently provide important constraints to the hazard and risk management.