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Nicole SharpSlipping Ice StreamsThe Northeast Greenland Ice Stream provides about 12% of the island’s annual ice discharge, and so far, models cannot accurately capture just how quickly the ice moves. Researchers deployed a fiber-optic cable into a borehole and set explosive charges on the ice to capture images of its interior through seismology. But <a href="https://doi.org/10.1126/science.adp8094" rel="nofollow noopener noreferrer" target="_blank">in the process</a>, they measured seismic events that didn’t correspond to the team’s charges.Instead, the researchers identified the signals as small, cascading icequakes that were undetectable from the surface. The quakes were signs of ice locally sticking and slipping — a failure mode that current models don’t capture. Moreover, the team was able to isolate each event to distinct layers of the ice, all of which corresponded to ice strata affected by volcanic ash (note the dark streak in the ice core image above). Whenever a volcanic eruption spread ash on the ice, it created a weaker layer. Even after hundreds more meters of ice have formed atop these weaker layers, the ice still breaks first in those layers, which may account for the ice stream’s higher-than-predicted flow. (Image credit: L. Warzecha/LWimages; research credit: <a href="https://doi.org/10.1126/science.adp8094" rel="nofollow noopener noreferrer" target="_blank">A. Fichtner et al.</a>; via <a href="https://eos.org/articles/tiny-icequakes-ripple-through-greenlands-largest-ice-stream?__readwiseLocation=" rel="nofollow noopener noreferrer" target="_blank">Eos</a>)<a rel="nofollow noopener noreferrer" class="hashtag u-tag u-category" href="https://fyfluiddynamics.com/tagged/fluid-dynamics/" target="_blank">#fluidDynamics</a> <a rel="nofollow noopener noreferrer" class="hashtag u-tag u-category" href="https://fyfluiddynamics.com/tagged/geology/" target="_blank">#geology</a> <a rel="nofollow noopener noreferrer" class="hashtag u-tag u-category" href="https://fyfluiddynamics.com/tagged/geophysics/" target="_blank">#geophysics</a> <a rel="nofollow noopener noreferrer" class="hashtag u-tag u-category" href="https://fyfluiddynamics.com/tagged/glacier/" target="_blank">#glacier</a> <a rel="nofollow noopener noreferrer" class="hashtag u-tag u-category" href="https://fyfluiddynamics.com/tagged/glaciology/" target="_blank">#glaciology</a> <a rel="nofollow noopener noreferrer" class="hashtag u-tag u-category" href="https://fyfluiddynamics.com/tagged/ice/" target="_blank">#ice</a> <a rel="nofollow noopener noreferrer" class="hashtag u-tag u-category" href="https://fyfluiddynamics.com/tagged/ice-formation/" target="_blank">#iceFormation</a> <a rel="nofollow noopener noreferrer" class="hashtag u-tag u-category" href="https://fyfluiddynamics.com/tagged/physics/" target="_blank">#physics</a> <a rel="nofollow noopener noreferrer" class="hashtag u-tag u-category" href="https://fyfluiddynamics.com/tagged/science/" target="_blank">#science</a> <a rel="nofollow noopener noreferrer" class="hashtag u-tag u-category" href="https://fyfluiddynamics.com/tagged/seismic-waves/" target="_blank">#seismicWaves</a> <a rel="nofollow noopener noreferrer" class="hashtag u-tag u-category" href="https://fyfluiddynamics.com/tagged/seismology/" target="_blank">#seismology</a>

Nicole SharpA Seismic Warning for the Tongan EruptionIn mid-January 2022, the Hunga Tonga-Hunga Ha’apai (HTHH) volcano had one of the most massive eruptions ever recorded, destroying an island, generating a tsunami, and blanketing Tonga in ash. Volcanologists are accustomed to monitoring nearby seismic equipment for signs of an imminent eruption, but <a href="https://doi.org/10.1029/2024GL111144" rel="nofollow noopener noreferrer" target="_blank">researchers found</a> that the HTHH eruption generated a surface-level seismic wave picked up by detectors 750 kilometers away about 15 minutes before the eruption began. They propose that the seismic wave occurred when the oceanic crust beneath the caldera fractured. That fracture could have allowed seawater and magma to mix above the volcano’s subsurface magma chamber, creating the explosive trigger for the eruption. Their finding suggests that real-time monitoring for these distant signals could provide valuable early warning of future eruptions. (Image credit: NASA Earth Observatory; research credit: <a href="https://doi.org/10.1029/2024GL111144" rel="nofollow noopener noreferrer" target="_blank">T. Horiuchi et al.</a>; via <a href="https://gizmodo.com/something-weird-happened-15-minutes-before-the-giant-tonga-eruption-of-2022-2000520310?__readwiseLocation=" rel="nofollow noopener noreferrer" target="_blank">Gizmodo</a> and <a href="https://news.agu.org/press-release/new-trigger-tonga-eruption/" rel="nofollow noopener noreferrer" target="_blank">AGU News</a>)<a rel="nofollow noopener noreferrer" class="hashtag u-tag u-category" href="https://fyfluiddynamics.com/tagged/eruption/" target="_blank">#eruption</a> <a rel="nofollow noopener noreferrer" class="hashtag u-tag u-category" href="https://fyfluiddynamics.com/tagged/fluid-dynamics/" target="_blank">#fluidDynamics</a> <a rel="nofollow noopener noreferrer" class="hashtag u-tag u-category" href="https://fyfluiddynamics.com/tagged/physics/" target="_blank">#physics</a> <a rel="nofollow noopener noreferrer" class="hashtag u-tag u-category" href="https://fyfluiddynamics.com/tagged/science/" target="_blank">#science</a> <a rel="nofollow noopener noreferrer" class="hashtag u-tag u-category" href="https://fyfluiddynamics.com/tagged/seismic-waves/" target="_blank">#seismicWaves</a> <a rel="nofollow noopener noreferrer" class="hashtag u-tag u-category" href="https://fyfluiddynamics.com/tagged/seismology/" target="_blank">#seismology</a> <a rel="nofollow noopener noreferrer" class="hashtag u-tag u-category" href="https://fyfluiddynamics.com/tagged/volcano/" target="_blank">#volcano</a>

Nicole SharpThe surface features of Mars — crossed by river deltas and sedimentary deposits — indicate a watery past. Where that water went after the planet lost its atmosphere 3 – 4 billion years ago is an open question. But a <a href="https://doi.org/10.1073/pnas.2409983121" rel="nofollow noopener noreferrer" target="_blank">new study suggests</a> that quite a bit of that water moved underground rather than escaping to space.The research team analyzed seismic data from the Mars InSight Lander. Marsquakes and meteor strikes on the Red Planet send seismic waves through the planet’s interior. The waves’ speed and other characteristics change as they pass through different materials, and by comparing different waves picked up from the same originating source, scientists can back out what the waves passed through on the way to the detector. In this case, the team concluded that the data best fit a layer of water-filled fractured igneous rock 11.5 – 20 kilometers below the surface. They estimate that the water trapped in this subsurface layer is enough to cover the surface of the planet in a 1 – 2 kilometer deep ocean. (Image credit: NASA/JPL-Caltech; research credit: <a href="https://doi.org/10.1073/pnas.2409983121" rel="nofollow noopener noreferrer" target="_blank">V. Wright et al.</a>; via <a href="https://physicsworld.com/a/liquid-water-could-abound-in-martian-crust-seismic-study-suggests/?utm_campaign=14290-58828&utm_content=Title%3A%20Liquid%20water%20could%20abound%20in%20Martian%20crust%2C%20seismic%20study%20suggests%20-%20Editors_pick&utm_term=&utm_medium=email&utm_source=iop" rel="nofollow noopener noreferrer" target="_blank">Physics World</a>)<a href="https://fyfluiddynamics.com/2024/09/water-suspected-beneath-mars/" class="" rel="nofollow noopener noreferrer" target="_blank">https://fyfluiddynamics.com/2024/09/water-suspected-beneath-mars/</a><a rel="nofollow noopener noreferrer" class="hashtag u-tag u-category" href="https://fyfluiddynamics.com/tagged/fluid-dynamics/" target="_blank">#fluidDynamics</a> <a rel="nofollow noopener noreferrer" class="hashtag u-tag u-category" href="https://fyfluiddynamics.com/tagged/geology/" target="_blank">#geology</a> <a rel="nofollow noopener noreferrer" class="hashtag u-tag u-category" href="https://fyfluiddynamics.com/tagged/mars/" target="_blank">#Mars</a> <a rel="nofollow noopener noreferrer" class="hashtag u-tag u-category" href="https://fyfluiddynamics.com/tagged/physics/" target="_blank">#physics</a> <a rel="nofollow noopener noreferrer" class="hashtag u-tag u-category" href="https://fyfluiddynamics.com/tagged/planetary-science/" target="_blank">#planetaryScience</a> <a rel="nofollow noopener noreferrer" class="hashtag u-tag u-category" href="https://fyfluiddynamics.com/tagged/science/" target="_blank">#science</a> <a rel="nofollow noopener noreferrer" class="hashtag u-tag u-category" href="https://fyfluiddynamics.com/tagged/seismic-waves/" target="_blank">#seismicWaves</a>

Scientific EuropeanWhat caused the Mysterious Seismic Waves Recorded in September 2023  In September 2023, uniform single frequency seismic waves were recorded at centres across the globe which lasted for nine days............ <a href="https://toot.community/tags/ClimateChange" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#ClimateChange</a> <a href="https://toot.community/tags/Dicksonfjord" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Dicksonfjord</a> <a href="https://toot.community/tags/Eartquake" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Eartquake</a> <a href="https://toot.community/tags/Fjord" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Fjord</a> <a href="https://toot.community/tags/Globalwarmimg" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Globalwarmimg</a> <a href="https://toot.community/tags/Greenland" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Greenland</a> <a href="https://toot.community/tags/Polarice" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Polarice</a> <a href="https://toot.community/tags/Seismicwaves" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Seismicwaves</a> SCIEU Team <a href="https://www.scientificeuropean.co.uk/sciences/earth-science/what-caused-the-mysterious-seismic-waves-recorded-in-september-2023/" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://www.scientificeuropean.co.uk/sciences/earth-science/what-caused-the-mysterious-seismic-waves-recorded-in-september-2023/</a>

💧🌏 Greg CocksRapid Response Seafloor Seismology [USGS] -- <a href="https://www.usgs.gov/news/featured-story/rapid-response-seafloor-seismology" target="_blank" rel="nofollow noopener noreferrer" translate="no">https://www.usgs.gov/news/featured-story/rapid-response-seafloor-seismology</a> <-- shared technical article -- <a href="https://techhub.social/tags/GIS" class="mention hashtag" rel="tag">#GIS</a> <a href="https://techhub.social/tags/spatial" class="mention hashtag" rel="tag">#spatial</a> <a href="https://techhub.social/tags/mapping" class="mention hashtag" rel="tag">#mapping</a> <a href="https://techhub.social/tags/geology" class="mention hashtag" rel="tag">#geology</a> <a href="https://techhub.social/tags/earthquakes" class="mention hashtag" rel="tag">#earthquakes</a> <a href="https://techhub.social/tags/monitoring" class="mention hashtag" rel="tag">#monitoring</a> <a href="https://techhub.social/tags/remotesensing" class="mention hashtag" rel="tag">#remotesensing</a> <a href="https://techhub.social/tags/geohazards" class="mention hashtag" rel="tag">#geohazards</a> <a href="https://techhub.social/tags/marine" class="mention hashtag" rel="tag">#marine</a> <a href="https://techhub.social/tags/massmovement" class="mention hashtag" rel="tag">#massmovement</a> <a href="https://techhub.social/tags/geology" class="mention hashtag" rel="tag">#geology</a> <a href="https://techhub.social/tags/engineeringgeology" class="mention hashtag" rel="tag">#engineeringgeology</a> <a href="https://techhub.social/tags/tsunami" class="mention hashtag" rel="tag">#tsunami</a> <a href="https://techhub.social/tags/volcano" class="mention hashtag" rel="tag">#volcano</a> <a href="https://techhub.social/tags/risk" class="mention hashtag" rel="tag">#risk</a> <a href="https://techhub.social/tags/hazard" class="mention hashtag" rel="tag">#hazard</a> <a href="https://techhub.social/tags/forecasting" class="mention hashtag" rel="tag">#forecasting</a> <a href="https://techhub.social/tags/seafloor" class="mention hashtag" rel="tag">#seafloor</a> <a href="https://techhub.social/tags/seismology" class="mention hashtag" rel="tag">#seismology</a> <a href="https://techhub.social/tags/hazardmaps" class="mention hashtag" rel="tag">#hazardmaps</a> <a href="https://techhub.social/tags/models" class="mention hashtag" rel="tag">#models</a> <a href="https://techhub.social/tags/modeling" class="mention hashtag" rel="tag">#modeling</a> <a href="https://techhub.social/tags/mitigation" class="mention hashtag" rel="tag">#mitigation</a> <a href="https://techhub.social/tags/seismograph" class="mention hashtag" rel="tag">#seismograph</a> <a href="https://techhub.social/tags/seismicwaves" class="mention hashtag" rel="tag">#seismicwaves</a> <a href="https://techhub.social/tags/instrumentation" class="mention hashtag" rel="tag">#instrumentation</a> <a href="https://techhub.social/tags/underwater" class="mention hashtag" rel="tag">#underwater</a> <a href="https://techhub.social/tags/remote" class="mention hashtag" rel="tag">#remote</a> <a href="https://techhub.social/tags/tectonics" class="mention hashtag" rel="tag">#tectonics</a> @USGS

Ansgar Schmidt :verified:Mars Has Lots of Water, But It’s Out of Reach <a href="https://www.universetoday.com/168107/mars-has-lots-of-water-but-its-out-of-reach/" rel="nofollow noopener noreferrer" target="_blank">https://www.universetoday.com/168107/mars-has-lots-of-water-but-its-out-of-reach/</a> <a href="https://mastodon.cloud/tags/seismicexperimentforinteriorstructure" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#seismicexperimentforinteriorstructure</a> <a href="https://mastodon.cloud/tags/seismicwaves" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#seismicwaves</a> <a href="https://mastodon.cloud/tags/felsicrock" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#felsicrock</a> <a href="https://mastodon.cloud/tags/maficrock" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#maficrock</a> <a href="https://mastodon.cloud/tags/porosity" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#porosity</a> <a href="https://mastodon.cloud/tags/insight" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#insight</a> <a href="https://mastodon.cloud/tags/crust" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#crust</a> <a href="https://mastodon.cloud/tags/water" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#water</a> <a href="https://mastodon.cloud/tags/mars" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#mars</a>

Ansgar Schmidt :verified:Here’s Why We Should Put a Gravitational Wave Observatory on the Moon <a href="https://www.universetoday.com/166744/heres-why-we-should-put-a-gravitational-wave-observatory-on-the-moon/" rel="nofollow noopener noreferrer" target="_blank">https://www.universetoday.com/166744/heres-why-we-should-put-a-gravitational-wave-observatory-on-the-moon/</a> <a href="https://mastodon.cloud/tags/gravitationalwaveobservatories" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#gravitationalwaveobservatories</a> <a href="https://mastodon.cloud/tags/blackholeneutronstarmergers" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#blackholeneutronstarmergers</a> <a href="https://mastodon.cloud/tags/lunargravitationalwavearray" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#lunargravitationalwavearray</a> <a href="https://mastodon.cloud/tags/multimessengerastronomy" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#multimessengerastronomy</a> <a href="https://mastodon.cloud/tags/gravitationalwaves" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#gravitationalwaves</a> <a href="https://mastodon.cloud/tags/whitedwarfmergers" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#whitedwarfmergers</a> <a href="https://mastodon.cloud/tags/blackholemergers" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#blackholemergers</a> <a href="https://mastodon.cloud/tags/observatories" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#observatories</a> <a href="https://mastodon.cloud/tags/seismicwaves" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#seismicwaves</a> <a href="https://mastodon.cloud/tags/moon" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#moon</a>

Matt WillemsenThe Heart of Mars: Seismic Waves Reveal the Red Planet’s Inner Secrets Researchers have gained new insights into Mars’ liquid core, discovering that it is slightly denser and smaller than previously believed, and contains a mixture of iron and other elements. The findings, obtained through the first-ever detections of seismic waves on the Martian core, contribute to our understanding of the planet’s formation and evolution. <a href="https://scitechdaily.com/the-heart-of-mars-seismic-waves-reveal-the-red-planets-inner-secrets/" rel="nofollow noopener noreferrer" target="_blank">https://scitechdaily.com/the-heart-of-mars-seismic-waves-reveal-the-red-planets-inner-secrets/</a> <a href="https://fedibird.com/tags/mars" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#mars</a> <a href="https://fedibird.com/tags/core" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#core</a> <a href="https://fedibird.com/tags/SeismicWaves" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#SeismicWaves</a>

European Research Council (ERC🌋 <a href="https://respublicae.eu/tags/Earthquakes" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Earthquakes</a> and <a href="https://respublicae.eu/tags/volcanic" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#volcanic</a> eruptions reminds us that events on the surface are connected to processes deep within the Earth. @arwendeuss at @UniUtrecht is scanning <a href="https://respublicae.eu/tags/seismicwaves" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#seismicwaves</a> to better understand their journey inside the Earth 🌍 More👉 <a href="http://bit.ly/3xrRLTK" rel="nofollow noopener noreferrer" target="_blank">http://bit.ly/3xrRLTK</a> <a href="https://respublicae.eu/@CORDIS_EU" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@CORDIS_EU</a> 🐦🔗: <a href="https://n.respublicae.eu/ERC_Research/status/1626869174701264896" rel="nofollow noopener noreferrer" target="_blank">https://n.respublicae.eu/ERC_Research/status/1626869174701264896</a>

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