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#megathrust

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DoomsdaysCW<p>Seismic study reveals hidden <a href="https://kolektiva.social/tags/megathrust" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>megathrust</span></a> <a href="https://kolektiva.social/tags/earthquake" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>earthquake</span></a> risk off <a href="https://kolektiva.social/tags/BritishColumbia" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>BritishColumbia</span></a></p><p>by Francesco Fiondella, Earth Institute at Columbia University<br>July 21, 2025</p><p>"A new study published in Science Advances has revealed the first detailed images of a newly developing <a href="https://kolektiva.social/tags/SubductionZone" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>SubductionZone</span></a> off the coast of British Columbia's Haida Gwaii archipelago.</p><p>"The international team of researchers collected the data for this study during a 2021 cruise by the Lamont-Doherty Earth Observatory's research vessel, the Marcus G. Langseth. They used a 15-kilometer-long underwater cable equipped with thousands of underwater microphones, called hydrophones, in the area off northern British Columbia to map the deep structure of Earth's subsurface.</p><p>"Their data confirmed that the <a href="https://kolektiva.social/tags/QueenCharlotteFaultSystem" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>QueenCharlotteFaultSystem</span></a> can generate powerful megathrust earthquakes, which are capable of producing strong shaking and <a href="https://kolektiva.social/tags/tsunamis" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>tsunamis</span></a>.</p><p>"Megathrusts are found in areas where one tectonic plate dives beneath another, in this case the Pacific plate being pushed under the North American plate. This area is known for generating powerful tremors. In fact, the Queen Charlotte fault system represents the greatest seismic hazard in Canada, producing the country's largest recorded earthquake in 1949 and a notable earthquake in 2012 that created a tsunami.</p><p>" 'This region is actively becoming a subduction zone, so understanding the fault structure here tells us about the early stages of subduction zone development,' says lead author Collin Brandl, a postdoctoral research scientist at the Lamont-Doherty Earth Observatory, part of the Columbia Climate School.</p><p>" 'Our study provides the first direct observations of the Haida Gwaii thrust, the 'megathrust' of this system, which can help improve hazard analysis in the region, better preparing residents for future earthquakes and tsunamis.' "</p><p>Source:<br><a href="https://phys.org/news/2025-07-seismic-reveals-hidden-megathrust-earthquake.html" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">phys.org/news/2025-07-seismic-</span><span class="invisible">reveals-hidden-megathrust-earthquake.html</span></a></p>
💧🌏 Greg Cocks<p>Randomness Of Megathrust Earthquakes Implied By Rapid Stress Recovery After The Japan Earthquake<br>--<br><a href="https://doi.org/10.1038/ngeo2343" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="">doi.org/10.1038/ngeo2343</span><span class="invisible"></span></a> &lt;-- shared (2015) paper<br>--<br><a href="https://techhub.social/tags/GIS" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>GIS</span></a> <a href="https://techhub.social/tags/spatial" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>spatial</span></a> <a href="https://techhub.social/tags/mapping" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>mapping</span></a> <a href="https://techhub.social/tags/model" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>model</span></a> <a href="https://techhub.social/tags/modeling" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>modeling</span></a> <a href="https://techhub.social/tags/earthquake" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>earthquake</span></a> <a href="https://techhub.social/tags/japan" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>japan</span></a> <a href="https://techhub.social/tags/subduction" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>subduction</span></a> <a href="https://techhub.social/tags/subductionzone" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>subductionzone</span></a> <a href="https://techhub.social/tags/geology" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>geology</span></a> <a href="https://techhub.social/tags/risk" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>risk</span></a> <a href="https://techhub.social/tags/hazard" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>hazard</span></a> <a href="https://techhub.social/tags/engineeringgeology" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>engineeringgeology</span></a> <a href="https://techhub.social/tags/structuralgeology" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>structuralgeology</span></a> <a href="https://techhub.social/tags/subsurface" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>subsurface</span></a> <a href="https://techhub.social/tags/3dmodel" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>3dmodel</span></a> <a href="https://techhub.social/tags/spatialanalysis" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>spatialanalysis</span></a> <a href="https://techhub.social/tags/spatiotemporal" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>spatiotemporal</span></a> <a href="https://techhub.social/tags/megathrust" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>megathrust</span></a> <a href="https://techhub.social/tags/japanese" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>japanese</span></a> <a href="https://techhub.social/tags/Tohoku" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Tohoku</span></a> <a href="https://techhub.social/tags/Tohoku2011" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Tohoku2011</span></a> <a href="https://techhub.social/tags/tectonics" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>tectonics</span></a> <a href="https://techhub.social/tags/platetectonics" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>platetectonics</span></a> <a href="https://techhub.social/tags/plates" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>plates</span></a> <a href="https://techhub.social/tags/stress" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>stress</span></a> <a href="https://techhub.social/tags/stressrelease" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>stressrelease</span></a> <a href="https://techhub.social/tags/rupture" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>rupture</span></a> <a href="https://techhub.social/tags/quake" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>quake</span></a></p>
💧🌏 Greg Cocks<p>The Difference Between Alarming And Catastrophic - Cascadia Megafault Has One Especially Deadly Section, New Map Reveals<br>--<br><a href="https://www.livescience.com/planet-earth/geology/the-difference-between-alarming-and-catastrophic-cascadia-megafault-has-1-especially-deadly-section-new-map-reveals" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">livescience.com/planet-earth/g</span><span class="invisible">eology/the-difference-between-alarming-and-catastrophic-cascadia-megafault-has-1-especially-deadly-section-new-map-reveals</span></a> &lt;-- shared technical article<br>--<br><a href="https://news.climate.columbia.edu/2024/06/08/cascadia-subduction-zone-one-of-earths-top-hazards-comes-into-sharper-focus/" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">news.climate.columbia.edu/2024</span><span class="invisible">/06/08/cascadia-subduction-zone-one-of-earths-top-hazards-comes-into-sharper-focus/</span></a> &lt;-- shared technical statement<br>--<br><a href="https://doi.org/10.1126/sciadv.adl3198" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="">doi.org/10.1126/sciadv.adl3198</span><span class="invisible"></span></a> &lt;-- shared paper<br>--<br><a href="https://techhub.social/tags/GIS" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>GIS</span></a> <a href="https://techhub.social/tags/spatial" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>spatial</span></a> <a href="https://techhub.social/tags/mapping" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>mapping</span></a> <a href="https://techhub.social/tags/engineeringgeology" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>engineeringgeology</span></a> <a href="https://techhub.social/tags/risk" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>risk</span></a> <a href="https://techhub.social/tags/hazard" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>hazard</span></a> <a href="https://techhub.social/tags/megathrust" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>megathrust</span></a> <a href="https://techhub.social/tags/fault" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>fault</span></a> <a href="https://techhub.social/tags/faulting" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>faulting</span></a> <a href="https://techhub.social/tags/earthquake" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>earthquake</span></a> <a href="https://techhub.social/tags/PNW" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>PNW</span></a> <a href="https://techhub.social/tags/PacificNorthwest" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>PacificNorthwest</span></a> <a href="https://techhub.social/tags/CascadiaSubductionZone" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>CascadiaSubductionZone</span></a> <a href="https://techhub.social/tags/remotesensing" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>remotesensing</span></a> <a href="https://techhub.social/tags/naturalhazard" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>naturalhazard</span></a> <a href="https://techhub.social/tags/mitigation" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>mitigation</span></a> <a href="https://techhub.social/tags/model" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>model</span></a> <a href="https://techhub.social/tags/modeling" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>modeling</span></a> <a href="https://techhub.social/tags/geophysics" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>geophysics</span></a> <a href="https://techhub.social/tags/seismology" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>seismology</span></a> <a href="https://techhub.social/tags/tsunami" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>tsunami</span></a> <a href="https://techhub.social/tags/displacement" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>displacement</span></a> <a href="https://techhub.social/tags/buildingcodes" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>buildingcodes</span></a> <a href="https://techhub.social/tags/engineering" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>engineering</span></a> <a href="https://techhub.social/tags/construction" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>construction</span></a> <a href="https://techhub.social/tags/warningsystems" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>warningsystems</span></a> <a href="https://techhub.social/tags/plates" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>plates</span></a> <a href="https://techhub.social/tags/platetectonics" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>platetectonics</span></a> <a href="https://techhub.social/tags/spatialanalysis" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>spatialanalysis</span></a> <a href="https://techhub.social/tags/geometry" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>geometry</span></a></p>
💧🌏 Greg Cocks<p>Cascadia Subduction Zone, One Of Earth's Top Hazards, Comes Into Sharper Focus<br>--<br><a href="https://phys.org/news/2024-06-cascadia-subduction-zone-earth-hazards.html" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">phys.org/news/2024-06-cascadia</span><span class="invisible">-subduction-zone-earth-hazards.html</span></a> &lt;-- shared technical article<br>--<br><a href="https://doi.org/10.1126/sciadv.adl3198" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="">doi.org/10.1126/sciadv.adl3198</span><span class="invisible"></span></a> &lt;-- shared paper<br>--<br><a href="https://techhub.social/tags/GIS" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>GIS</span></a> <a href="https://techhub.social/tags/spatial" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>spatial</span></a> <a href="https://techhub.social/tags/mapping" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>mapping</span></a> <a href="https://techhub.social/tags/PNW" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>PNW</span></a> <a href="https://techhub.social/tags/USA" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>USA</span></a> <a href="https://techhub.social/tags/PacificNorthwest" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>PacificNorthwest</span></a> <a href="https://techhub.social/tags/BritishColumbia" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>BritishColumbia</span></a> <a href="https://techhub.social/tags/Washington" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Washington</span></a> <a href="https://techhub.social/tags/Oregon" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Oregon</span></a> <a href="https://techhub.social/tags/NoCal" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>NoCal</span></a> <a href="https://techhub.social/tags/Seattle" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Seattle</span></a> <a href="https://techhub.social/tags/BC" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>BC</span></a> <a href="https://techhub.social/tags/CascadiaSubductionZone" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>CascadiaSubductionZone</span></a> <a href="https://techhub.social/tags/CSZ" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>CSZ</span></a> <a href="https://techhub.social/tags/megathrust" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>megathrust</span></a> <a href="https://techhub.social/tags/earthquake" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>earthquake</span></a> <a href="https://techhub.social/tags/earthquakes" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>earthquakes</span></a> <a href="https://techhub.social/tags/fault" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>fault</span></a> <a href="https://techhub.social/tags/faulting" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>faulting</span></a> <a href="https://techhub.social/tags/risk" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>risk</span></a> <a href="https://techhub.social/tags/hazard" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>hazard</span></a> <a href="https://techhub.social/tags/geology" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>geology</span></a> <a href="https://techhub.social/tags/structuralgeology" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>structuralgeology</span></a> <a href="https://techhub.social/tags/engineeringgeology" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>engineeringgeology</span></a> <a href="https://techhub.social/tags/remotesensing" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>remotesensing</span></a> <a href="https://techhub.social/tags/survey" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>survey</span></a> <a href="https://techhub.social/tags/geophysics" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>geophysics</span></a> <a href="https://techhub.social/tags/tsunami" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>tsunami</span></a> <a href="https://techhub.social/tags/buildingcodes" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>buildingcodes</span></a> <a href="https://techhub.social/tags/warningsystems" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>warningsystems</span></a> <a href="https://techhub.social/tags/coast" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>coast</span></a> <a href="https://techhub.social/tags/coastal" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>coastal</span></a> <a href="https://techhub.social/tags/tectonics" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>tectonics</span></a> <a href="https://techhub.social/tags/plates" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>plates</span></a> <a href="https://techhub.social/tags/model" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>model</span></a> <a href="https://techhub.social/tags/modeling" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>modeling</span></a></p>
Smitha 🌸🌋🎻<p>Really was not expecting to hear the name <a href="https://kind.social/tags/Shimanto" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Shimanto</span></a> (AKA <a href="https://kind.social/tags/KochiPrefecture" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>KochiPrefecture</span></a>) in a lecture about the <a href="https://kind.social/tags/Cascadia" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Cascadia</span></a> / <a href="https://kind.social/tags/JuanDeFuca" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>JuanDeFuca</span></a> fault.</p><p>The Shimanto Mountains were mentioned as an analog of our own <a href="https://kind.social/tags/OlympicMountains" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>OlympicMountains</span></a> - both are non-volcanic, near a <a href="https://kind.social/tags/megathrust" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>megathrust</span></a> <a href="https://kind.social/tags/SubductionZone" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>SubductionZone</span></a> (<a href="https://kind.social/tags/NankaiTrough" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>NankaiTrough</span></a> for Japan: major <a href="https://kind.social/tags/earthquake" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>earthquake</span></a> every 100-200 years), and contain remnants of paleomegathrust (new fave word) fault lines thanks to historic and ongoing subduction.</p><p>As terrifying as it can be, I love <a href="https://kind.social/tags/geology" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>geology</span></a> so much.</p>
💧🌏 Greg Cocks<p>Large-Scale Submarine Landslides In The Barberton Greenstone Belt, Southern Africa—Evidence For Subduction And Great Earthquakes In The Paleoarchean<br>--<br><a href="https://pubs.geoscienceworld.org/gsa/geology/article-abstract/doi/10.1130/G51997.1/635654/Large-scale-submarine-landslides-in-the-Barberton" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">pubs.geoscienceworld.org/gsa/g</span><span class="invisible">eology/article-abstract/doi/10.1130/G51997.1/635654/Large-scale-submarine-landslides-in-the-Barberton</span></a> &lt;-- shared paper (PDF only)<br>--<br><a href="https://techhub.social/tags/GIS" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>GIS</span></a> <a href="https://techhub.social/tags/spatial" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>spatial</span></a> <a href="https://techhub.social/tags/mapping" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>mapping</span></a> <a href="https://techhub.social/tags/structuralgeology" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>structuralgeology</span></a> <a href="https://techhub.social/tags/SouthAfrica" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>SouthAfrica</span></a> <a href="https://techhub.social/tags/NewZealand" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>NewZealand</span></a> <a href="https://techhub.social/tags/tectonics" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>tectonics</span></a> <a href="https://techhub.social/tags/subduction" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>subduction</span></a> <a href="https://techhub.social/tags/BarbertonGreenstoneBelt" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>BarbertonGreenstoneBelt</span></a> <a href="https://techhub.social/tags/geologicmapping" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>geologicmapping</span></a> <a href="https://techhub.social/tags/geology" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>geology</span></a> <a href="https://techhub.social/tags/earthquakes" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>earthquakes</span></a> <a href="https://techhub.social/tags/paleoarchean" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>paleoarchean</span></a> <a href="https://techhub.social/tags/stratigraphy" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>stratigraphy</span></a> <a href="https://techhub.social/tags/marine" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>marine</span></a> <a href="https://techhub.social/tags/sedimentation" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>sedimentation</span></a> <a href="https://techhub.social/tags/submarinelandslide" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>submarinelandslide</span></a> <a href="https://techhub.social/tags/hikurangi" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>hikurangi</span></a> <a href="https://techhub.social/tags/megathrust" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>megathrust</span></a> <a href="https://techhub.social/tags/superposition" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>superposition</span></a></p>
💧🌏 Greg Cocks<p>Shallow Slow Slip Events Identified Offshore The Osa Peninsula In Southern Costa Rica From GNSS Time Series [geologic faults / tectonics]<br>--<br><a href="https://doi.org/10.1029/2023GL104771" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="">doi.org/10.1029/2023GL104771</span><span class="invisible"></span></a> &lt;-- shared paper<br>--<br><a href="https://techhub.social/tags/GIS" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>GIS</span></a> <a href="https://techhub.social/tags/spatial" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>spatial</span></a> <a href="https://techhub.social/tags/mapping" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>mapping</span></a> <a href="https://techhub.social/tags/GPS" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>GPS</span></a> <a href="https://techhub.social/tags/survey" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>survey</span></a> <a href="https://techhub.social/tags/GNSS" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>GNSS</span></a> <a href="https://techhub.social/tags/costarica" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>costarica</span></a> <a href="https://techhub.social/tags/earthquake" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>earthquake</span></a> <a href="https://techhub.social/tags/faults" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>faults</span></a> <a href="https://techhub.social/tags/faulting" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>faulting</span></a> <a href="https://techhub.social/tags/tectonics" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>tectonics</span></a> <a href="https://techhub.social/tags/shallowslowslipevent" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>shallowslowslipevent</span></a> <a href="https://techhub.social/tags/SSE" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>SSE</span></a> <a href="https://techhub.social/tags/shallowslowslip" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>shallowslowslip</span></a> <a href="https://techhub.social/tags/slowslip" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>slowslip</span></a> <a href="https://techhub.social/tags/geodetic" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>geodetic</span></a> <a href="https://techhub.social/tags/spatialanalysis" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>spatialanalysis</span></a> <a href="https://techhub.social/tags/spatiotemporal" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>spatiotemporal</span></a> <a href="https://techhub.social/tags/osa" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>osa</span></a> <a href="https://techhub.social/tags/OsaPeninsula" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>OsaPeninsula</span></a> <a href="https://techhub.social/tags/station" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>station</span></a> <a href="https://techhub.social/tags/platetectonics" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>platetectonics</span></a> <a href="https://techhub.social/tags/geology" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>geology</span></a> <a href="https://techhub.social/tags/megathrust" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>megathrust</span></a> <a href="https://techhub.social/tags/MiddleAmericanTrench" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>MiddleAmericanTrench</span></a> <a href="https://techhub.social/tags/centralamerica" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>centralamerica</span></a> <a href="https://techhub.social/tags/platemotion" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>platemotion</span></a> <a href="https://techhub.social/tags/model" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>model</span></a> <a href="https://techhub.social/tags/modeling" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>modeling</span></a></p>
💧🌏 Greg Cocks<p>Geoscientists Discover Massive Undersea Water Reservoir Off New Zealand’s Coast<br>--<br><a href="https://www.sci.news/othersciences/geophysics/hikurangi-water-reservoir-12323.html" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">sci.news/othersciences/geophys</span><span class="invisible">ics/hikurangi-water-reservoir-12323.html</span></a> &lt;-- shared technical article<br>--<br><a href="https://doi.org/10.1126/sciadv.adh0150" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="">doi.org/10.1126/sciadv.adh0150</span><span class="invisible"></span></a> &lt;-- shared paper<br>--<br><a href="https://techhub.social/tags/GIS" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>GIS</span></a> <a href="https://techhub.social/tags/spatial" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>spatial</span></a> <a href="https://techhub.social/tags/mapping" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>mapping</span></a> <a href="https://techhub.social/tags/remotesensing" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>remotesensing</span></a> <a href="https://techhub.social/tags/geology" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>geology</span></a> <a href="https://techhub.social/tags/structuralgeology" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>structuralgeology</span></a> <a href="https://techhub.social/tags/NewZealand" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>NewZealand</span></a> <a href="https://techhub.social/tags/model" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>model</span></a> <a href="https://techhub.social/tags/modeling" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>modeling</span></a> <a href="https://techhub.social/tags/megathrust" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>megathrust</span></a> <a href="https://techhub.social/tags/fault" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>fault</span></a> <a href="https://techhub.social/tags/faulting" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>faulting</span></a> <a href="https://techhub.social/tags/subduction" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>subduction</span></a> <a href="https://techhub.social/tags/water" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>water</span></a> <a href="https://techhub.social/tags/groundwater" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>groundwater</span></a> <a href="https://techhub.social/tags/Hikurangi" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Hikurangi</span></a> <a href="https://techhub.social/tags/hydrogeology" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>hydrogeology</span></a> <a href="https://techhub.social/tags/igneous" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>igneous</span></a> <a href="https://techhub.social/tags/vulcanism" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>vulcanism</span></a> <a href="https://techhub.social/tags/volcaniclastic" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>volcaniclastic</span></a> <a href="https://techhub.social/tags/seamounts" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>seamounts</span></a> <a href="https://techhub.social/tags/marine" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>marine</span></a> <a href="https://techhub.social/tags/bathymetry" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>bathymetry</span></a> <a href="https://techhub.social/tags/seafloor" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>seafloor</span></a> <a href="https://techhub.social/tags/volcanicplateau" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>volcanicplateau</span></a> <a href="https://techhub.social/tags/subductionzone" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>subductionzone</span></a> <a href="https://techhub.social/tags/seismicimaging" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>seismicimaging</span></a> <a href="https://techhub.social/tags/seismic" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>seismic</span></a> <a href="https://techhub.social/tags/earthquake" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>earthquake</span></a> <a href="https://techhub.social/tags/slowslip" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>slowslip</span></a> <a href="https://techhub.social/tags/tectonics" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>tectonics</span></a> <a href="https://techhub.social/tags/geoscience" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>geoscience</span></a></p>
HistoPol (#HP) 🏴 🇺🇸 🏴<p><span class="h-card"><a href="https://masto.ai/@dustcircle" class="u-url mention" rel="nofollow noopener" target="_blank">@<span>dustcircle</span></a></span> </p><p>"Warm liquid spewing from <a href="https://mastodon.social/tags/Oregon" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Oregon</span></a> seafloor comes from <a href="https://mastodon.social/tags/CascadiaFault" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>CascadiaFault</span></a>, could offer clues to <a href="https://mastodon.social/tags/earthquake" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>earthquake</span></a> hazards </p><p>"...hence increases the friction between the oceanic and <a href="https://mastodon.social/tags/continental" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>continental</span></a> <a href="https://mastodon.social/tags/plates" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>plates</span></a>.</p><p>“The <a href="https://mastodon.social/tags/megathrust" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>megathrust</span></a> fault zone is like an air hockey table,” ...“If the fluid pressure is high, it’s like the air is turned on, meaning there’s less friction and the two <a href="https://mastodon.social/tags/plates" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>plates</span></a>..."</p><p><a href="https://www.washington.edu/news/2023/04/10/warm-liquid-spewing-from-oregon-seafloor-comes-from-cascadia-fault-could-offer-clues-to-earthquake-hazards/" rel="nofollow noopener" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">washington.edu/news/2023/04/10</span><span class="invisible">/warm-liquid-spewing-from-oregon-seafloor-comes-from-cascadia-fault-could-offer-clues-to-earthquake-hazards/</span></a></p>
PhoenixSerenity<p>Work at the <a href="https://mastodon.sdf.org/tags/PebbleHill" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>PebbleHill</span></a> <a href="https://mastodon.sdf.org/tags/reservoir" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>reservoir</span></a> began in the fall of 2021 to prepare for <a href="https://mastodon.sdf.org/tags/NaturalDisasters" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>NaturalDisasters</span></a> in the future.<br>Metro <a href="https://mastodon.sdf.org/tags/Vancouver" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Vancouver</span></a> has been steadily <a href="https://mastodon.sdf.org/tags/upgrading" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>upgrading</span></a> its reservoirs since the '90s to ensure it can provide <a href="https://mastodon.sdf.org/tags/water" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>water</span></a> to the region following the "<a href="https://mastodon.sdf.org/tags/BigOne" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>BigOne</span></a> " — a <a href="https://mastodon.sdf.org/tags/megathrust" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>megathrust</span></a> <a href="https://mastodon.sdf.org/tags/earthquake" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>earthquake</span></a> expected to hit the <a href="https://mastodon.sdf.org/tags/BCcoast" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>BCcoast</span></a> someday.<br><a href="https://www.cbc.ca/amp/1.6783105" rel="nofollow noopener" target="_blank"><span class="invisible">https://www.</span><span class="">cbc.ca/amp/1.6783105</span><span class="invisible"></span></a></p><p><a href="https://mastodon.sdf.org/tags/BritishColumbia" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>BritishColumbia</span></a> <a href="https://mastodon.sdf.org/tags/Canada" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Canada</span></a> <a href="https://mastodon.sdf.org/tags/PNW" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>PNW</span></a> <a href="https://mastodon.sdf.org/tags/PacificNorthwest" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>PacificNorthwest</span></a> <a href="https://mastodon.sdf.org/tags/EarthquakeProofing" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>EarthquakeProofing</span></a> <a href="https://mastodon.sdf.org/tags/PlanningAhead" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>PlanningAhead</span></a> <a href="https://mastodon.sdf.org/tags/Cascadia" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Cascadia</span></a> <a href="https://mastodon.sdf.org/tags/YVR" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>YVR</span></a></p>
Robin Lacassin<p>I am totally astounded by what I read when I compare these two texts: Maria Graham's description of the coastal <a href="https://qoto.org/tags/uplift" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>uplift</span></a> due to the 1822 <a href="https://qoto.org/tags/Valparaiso" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Valparaiso</span></a> <a href="https://qoto.org/tags/earthquake" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>earthquake</span></a>, versus Charles Darwin's text on very similar phenomena related to the 1835 <a href="https://qoto.org/tags/Concepci%C3%B3n" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Concepción</span></a> earthquake.</p><p>Read carefully, paying attention to the expressions used. It's like if <a href="https://qoto.org/tags/Darwin" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Darwin</span></a> borrowed Maria Graham's words, but also her interpretation about the accumulation of earthquakes raising the coast on the long term. 🤔 <br>Any comment ?</p><p>Both 1822 and 1835 earthquakes happened in Central <a href="https://qoto.org/tags/Chile" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Chile</span></a> on the <a href="https://qoto.org/tags/subduction" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>subduction</span></a> <a href="https://qoto.org/tags/megathrust" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>megathrust</span></a> between Nazca and South America <a href="https://qoto.org/tags/tectonic_plates" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>tectonic_plates</span></a>. Darwin's description, based on Fitz Roy (Beagle's captain) observations, is considered as seminal.</p><p>Thanks <span class="h-card"><a href="https://kolektiva.social/@haq" class="u-url mention" rel="nofollow noopener" target="_blank">@<span>haq</span></a></span> for pointing me to the work by Maria Graham.</p>
Robin Lacassin<p>This recalls that even in contexts like <a href="https://qoto.org/tags/Java" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Java</span></a> or <a href="https://qoto.org/tags/Sumatra" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Sumatra</span></a>, where the <a href="https://qoto.org/tags/subduction" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>subduction</span></a> <a href="https://qoto.org/tags/megathrust" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>megathrust</span></a> may produce very big <a href="https://qoto.org/tags/earthquakes" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>earthquakes</span></a>, much smaller shallow crustal ruptures may present significant hazards because closer to towns.<br>2/2</p>
Jascha Polet<p>Today’s M6.9 shallow <a href="https://mastodon.social/tags/megathrust" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>megathrust</span></a> <a href="https://mastodon.social/tags/earthquake" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>earthquake</span></a> (approximate location as purple blob) in the context of the <a href="https://mastodon.social/tags/rupture" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>rupture</span></a> areas of (numerous) previous <a href="https://mastodon.social/tags/subduction" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>subduction</span></a> events near <a href="https://mastodon.social/tags/Sumatra" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Sumatra</span></a> on a map from Putra et al. (2016)</p>
Robin Lacassin<p>A magnitude Mw6.9 <a href="https://qoto.org/tags/earthquake" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>earthquake</span></a> offshore south-central <a href="https://qoto.org/tags/Sumatra" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Sumatra</span></a>. </p><p>Mechanism and location suggest rupture on the shallow part of the <a href="https://qoto.org/tags/subduction" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>subduction</span></a> <a href="https://qoto.org/tags/megathrust" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>megathrust</span></a> close to the trench (on the very shallow dipping fault plane). However, modelled depth of ~19km, if true, seems little too deep given the closeness with the trench (USGS gives same depth and mechanism). This means that we cannot exclude a rupture on the steep fault plane within the oceanic plate.</p><p>Map with source time function from Geoscope IPGP<br><a href="http://geoscope.ipgp.fr/index.php/en/catalog/earthquake-description?seis=us7000iqpn" rel="nofollow noopener" target="_blank"><span class="invisible">http://</span><span class="ellipsis">geoscope.ipgp.fr/index.php/en/</span><span class="invisible">catalog/earthquake-description?seis=us7000iqpn</span></a><br>Larger map with epicenter of this event in red from USGS (both not yet on fediverse it seems)</p>
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