Shakedown Social

John E. Bartley, III (D) K7AAY<a href="https://www.wweek.com/news/schools/2025/03/26/the-truth-about-portlands-brick-schools-is-scarier-than-fiction/" rel="nofollow noopener" translate="no" target="_blank">https://www.wweek.com/news/schools/2025/03/26/the-truth-about-portlands-brick-schools-is-scarier-than-fiction/</a> <a href="https://pdx.social/tags/PDX" class="mention hashtag" rel="nofollow noopener" target="_blank">#PDX</a> <a href="https://pdx.social/tags/subduction" class="mention hashtag" rel="nofollow noopener" target="_blank">#subduction</a> <a href="https://pdx.social/tags/BigOne" class="mention hashtag" rel="nofollow noopener" target="_blank">#BigOne</a> <a href="https://pdx.social/tags/quake" class="mention hashtag" rel="nofollow noopener" target="_blank">#quake</a> <a href="https://pdx.social/tags/Portland" class="mention hashtag" rel="nofollow noopener" target="_blank">#Portland</a> <a href="https://pdx.social/tags/PortlandOR" class="mention hashtag" rel="nofollow noopener" target="_blank">#PortlandOR</a> <a href="https://pdx.social/tags/PortlandOregon" class="mention hashtag" rel="nofollow noopener" target="_blank">#PortlandOregon</a> <a href="https://pdx.social/tags/schools" class="mention hashtag" rel="nofollow noopener" target="_blank">#schools</a> <a href="https://pdx.social/tags/PPS" class="mention hashtag" rel="nofollow noopener" target="_blank">#PPS</a> <a href="https://pdx.social/tags/PortlandPublicSchools" class="mention hashtag" rel="nofollow noopener" target="_blank">#PortlandPublicSchools</a>

Bill MinarikA Gigapan image of <a href="https://fosstodon.org/tags/omphacite" class="mention hashtag" rel="nofollow noopener" target="_blank">#omphacite</a> from Jenner, California.The glorious green omphacite is surrounded by assorted other minerals.<a href="https://www.gigapan.com/galleries/7874/gigapans/17328" rel="nofollow noopener" translate="no" target="_blank">https://www.gigapan.com/galleries/7874/gigapans/17328</a> Ron Schott<a href="https://fosstodon.org/tags/MinCup24" class="mention hashtag" rel="nofollow noopener" target="_blank">#MinCup24</a> <a href="https://fosstodon.org/tags/Geology" class="mention hashtag" rel="nofollow noopener" target="_blank">#Geology</a> <a href="https://fosstodon.org/tags/Eclogite" class="mention hashtag" rel="nofollow noopener" target="_blank">#Eclogite</a> <a href="https://fosstodon.org/tags/Subduction" class="mention hashtag" rel="nofollow noopener" target="_blank">#Subduction</a>

Jascha PoletShallow M7.1 <a href="https://mastodon.social/tags/earthquake" class="mention hashtag" rel="nofollow noopener" target="_blank">#earthquake</a> off the coast of Miyazaki, <a href="https://mastodon.social/tags/japan" class="mention hashtag" rel="nofollow noopener" target="_blank">#japan</a> widely felt. Based on location and mechanism, likely a <a href="https://mastodon.social/tags/subduction" class="mention hashtag" rel="nofollow noopener" target="_blank">#subduction</a> thrust event, with some <a href="https://mastodon.social/tags/tsunami" class="mention hashtag" rel="nofollow noopener" target="_blank">#tsunami</a> generating potential. <a href="https://earthquake.usgs.gov/earthquakes/eventpage/us6000nith/executive" rel="nofollow noopener" translate="no" target="_blank">https://earthquake.usgs.gov/earthquakes/eventpage/us6000nith/executive</a>

Matt WillemsenThe Nature of Mantle Flow May Depend on the Type of Slab Subducting <a href="https://eos.org/research-spotlights/the-nature-of-mantle-flow-may-depend-on-the-type-of-slab-subducting" rel="nofollow noopener" translate="no" target="_blank">https://eos.org/research-spotlights/the-nature-of-mantle-flow-may-depend-on-the-type-of-slab-subducting</a> <a href="https://mastodon.social/tags/MantleFlow" class="mention hashtag" rel="nofollow noopener" target="_blank">#MantleFlow</a> <a href="https://mastodon.social/tags/Tectonics" class="mention hashtag" rel="nofollow noopener" target="_blank">#Tectonics</a> <a href="https://mastodon.social/tags/subduction" class="mention hashtag" rel="nofollow noopener" target="_blank">#subduction</a> <a href="https://mastodon.social/tags/slab" class="mention hashtag" rel="nofollow noopener" target="_blank">#slab</a> <a href="https://mastodon.social/tags/convection" class="mention hashtag" rel="nofollow noopener" target="_blank">#convection</a> <a href="https://mastodon.social/tags/dislocationcreep" class="mention hashtag" rel="nofollow noopener" target="_blank">#dislocationcreep</a>

Matt Willemsen“A Total Surprise” – Geologists Uncover New Origin Story for Deadly Seattle Fault <a href="https://scitechdaily.com/a-total-surprise-geologists-uncover-new-origin-story-for-deadly-seattle-fault/" rel="nofollow noopener" translate="no" target="_blank">https://scitechdaily.com/a-total-surprise-geologists-uncover-new-origin-story-for-deadly-seattle-fault/</a> <a href="https://mastodon.social/tags/geology" class="mention hashtag" rel="nofollow noopener" target="_blank">#geology</a> <a href="https://mastodon.social/tags/tectonics" class="mention hashtag" rel="nofollow noopener" target="_blank">#tectonics</a> <a href="https://mastodon.social/tags/seattle" class="mention hashtag" rel="nofollow noopener" target="_blank">#seattle</a> <a href="https://mastodon.social/tags/faullt" class="mention hashtag" rel="nofollow noopener" target="_blank">#faullt</a> <a href="https://mastodon.social/tags/subduction" class="mention hashtag" rel="nofollow noopener" target="_blank">#subduction</a> <a href="https://mastodon.social/tags/obduction" class="mention hashtag" rel="nofollow noopener" target="_blank">#obduction</a> <a href="https://mastodon.social/tags/tear" class="mention hashtag" rel="nofollow noopener" target="_blank">#tear</a> <a href="https://mastodon.social/tags/unzip" class="mention hashtag" rel="nofollow noopener" target="_blank">#unzip</a> <a href="https://mastodon.social/tags/gravity" class="mention hashtag" rel="nofollow noopener" target="_blank">#gravity</a> <a href="https://mastodon.social/tags/magnetic" class="mention hashtag" rel="nofollow noopener" target="_blank">#magnetic</a> <a href="https://mastodon.social/tags/seismic" class="mention hashtag" rel="nofollow noopener" target="_blank">#seismic</a>

Julie Webgirl - Just Your LuckI think I figured it out.The mass delusion of this mass infection event.I've told the story of how I got into <a href="https://masto.ai/tags/EmergencyPrep" class="mention hashtag" rel="nofollow noopener" target="_blank">#EmergencyPrep</a>... Local govt held a community meeting about preparing for a 9.0+ <a href="https://masto.ai/tags/subduction" class="mention hashtag" rel="nofollow noopener" target="_blank">#subduction</a> zone <a href="https://masto.ai/tags/earthquake" class="mention hashtag" rel="nofollow noopener" target="_blank">#earthquake</a> hitting the <a href="https://masto.ai/tags/PNW" class="mention hashtag" rel="nofollow noopener" target="_blank">#PNW</a>. Power co, water co, etc all gave useful advice.Then the fire chief stood up there and said"We're not coming to help you"Shock from the audience...Then the yelling ... 1/<a href="https://masto.ai/tags/Covid" class="mention hashtag" rel="nofollow noopener" target="_blank">#Covid</a> <a href="https://masto.ai/tags/CovidIsNotOver" class="mention hashtag" rel="nofollow noopener" target="_blank">#CovidIsNotOver</a> <a href="https://masto.ai/tags/MaskUp" class="mention hashtag" rel="nofollow noopener" target="_blank">#MaskUp</a> <a href="https://masto.ai/tags/CovidCautious" class="mention hashtag" rel="nofollow noopener" target="_blank">#CovidCautious</a>

Jascha PoletMap of <a href="https://mastodon.social/tags/philippines" class="mention hashtag" rel="nofollow noopener" target="_blank">#philippines</a> M7.6 <a href="https://mastodon.social/tags/earthquake" class="mention hashtag" rel="nofollow noopener" target="_blank">#earthquake</a> sequence (in purple) with mechanisms for largest aftershocks. The M6.9 was another <a href="https://mastodon.social/tags/subduction" class="mention hashtag" rel="nofollow noopener" target="_blank">#subduction</a> interface event, but the M6.6 was not. <a href="https://mastodon.social/tags/Aftershocks" class="mention hashtag" rel="nofollow noopener" target="_blank">#Aftershocks</a> are located all the way to (and possibly past) the trench.

Jascha PoletM7.4 shallow <a href="https://mastodon.social/tags/subduction" class="mention hashtag" rel="nofollow noopener" target="_blank">#subduction</a> thrust <a href="https://mastodon.social/tags/earthquake" class="mention hashtag" rel="nofollow noopener" target="_blank">#earthquake</a> in <a href="https://mastodon.social/tags/Alaska" class="mention hashtag" rel="nofollow noopener" target="_blank">#Alaska</a> in Shumagin segment of subduction zone <a href="https://www.emsc-csem.org/Earthquake_information/earthquake_map.php?id=1529242" rel="nofollow noopener" translate="no" target="_blank">https://www.emsc-csem.org/Earthquake_information/earthquake_map.php?id=1529242</a>

💧🌏 Greg CocksPost-Subduction Tectonics Induced By Extension From A Lithospheric Drip -- <a href="https://doi.org/10.1038/s41561-023-01201-7" rel="nofollow noopener" target="_blank">https://doi.org/10.1038/s41561-023-01201-7</a> <-- shared paper -- <a href="https://techhub.social/tags/GIS" class="mention hashtag" rel="nofollow noopener" target="_blank">#GIS</a> <a href="https://techhub.social/tags/spatial" class="mention hashtag" rel="nofollow noopener" target="_blank">#spatial</a> <a href="https://techhub.social/tags/mapping" class="mention hashtag" rel="nofollow noopener" target="_blank">#mapping</a> <a href="https://techhub.social/tags/formation" class="mention hashtag" rel="nofollow noopener" target="_blank">#formation</a> <a href="https://techhub.social/tags/mechanical" class="mention hashtag" rel="nofollow noopener" target="_blank">#mechanical</a> <a href="https://techhub.social/tags/data" class="mention hashtag" rel="nofollow noopener" target="_blank">#data</a> <a href="https://techhub.social/tags/geology" class="mention hashtag" rel="nofollow noopener" target="_blank">#geology</a> <a href="https://techhub.social/tags/structuralgeology" class="mention hashtag" rel="nofollow noopener" target="_blank">#structuralgeology</a> <a href="https://techhub.social/tags/platetectonics" class="mention hashtag" rel="nofollow noopener" target="_blank">#platetectonics</a> <a href="https://techhub.social/tags/subduction" class="mention hashtag" rel="nofollow noopener" target="_blank">#subduction</a> <a href="https://techhub.social/tags/tectonics" class="mention hashtag" rel="nofollow noopener" target="_blank">#tectonics</a> <a href="https://techhub.social/tags/lithosphere" class="mention hashtag" rel="nofollow noopener" target="_blank">#lithosphere</a> <a href="https://techhub.social/tags/model" class="mention hashtag" rel="nofollow noopener" target="_blank">#model</a> <a href="https://techhub.social/tags/modeling" class="mention hashtag" rel="nofollow noopener" target="_blank">#modeling</a> <a href="https://techhub.social/tags/Borneo" class="mention hashtag" rel="nofollow noopener" target="_blank">#Borneo</a> <a href="https://techhub.social/tags/magmatism" class="mention hashtag" rel="nofollow noopener" target="_blank">#magmatism</a> <a href="https://techhub.social/tags/topography" class="mention hashtag" rel="nofollow noopener" target="_blank">#topography</a> <a href="https://techhub.social/tags/uplift" class="mention hashtag" rel="nofollow noopener" target="_blank">#uplift</a> <a href="https://techhub.social/tags/Malysia" class="mention hashtag" rel="nofollow noopener" target="_blank">#Malysia</a> <a href="https://techhub.social/tags/spatialanalysis" class="mention hashtag" rel="nofollow noopener" target="_blank">#spatialanalysis</a> <a href="https://techhub.social/tags/remotesensing" class="mention hashtag" rel="nofollow noopener" target="_blank">#remotesensing</a> <a href="https://techhub.social/tags/seismology" class="mention hashtag" rel="nofollow noopener" target="_blank">#seismology</a> <a href="https://techhub.social/tags/seismic" class="mention hashtag" rel="nofollow noopener" target="_blank">#seismic</a> <a href="https://techhub.social/tags/geophysics" class="mention hashtag" rel="nofollow noopener" target="_blank">#geophysics</a> <a href="https://techhub.social/tags/gravity" class="mention hashtag" rel="nofollow noopener" target="_blank">#gravity</a> <a href="https://techhub.social/tags/gravational" class="mention hashtag" rel="nofollow noopener" target="_blank">#gravational</a> <a href="https://techhub.social/tags/volcanic" class="mention hashtag" rel="nofollow noopener" target="_blank">#volcanic</a> <a href="https://techhub.social/tags/vulcanism" class="mention hashtag" rel="nofollow noopener" target="_blank">#vulcanism</a> <a href="https://techhub.social/tags/arc" class="mention hashtag" rel="nofollow noopener" target="_blank">#arc</a> <a href="https://techhub.social/tags/simulation" class="mention hashtag" rel="nofollow noopener" target="_blank">#simulation</a> <a href="https://techhub.social/tags/simulations" class="mention hashtag" rel="nofollow noopener" target="_blank">#simulations</a> <a href="https://techhub.social/tags/crust" class="mention hashtag" rel="nofollow noopener" target="_blank">#crust</a> <a href="https://techhub.social/tags/mantle" class="mention hashtag" rel="nofollow noopener" target="_blank">#mantle</a> <a href="https://techhub.social/tags/continent" class="mention hashtag" rel="nofollow noopener" target="_blank">#continent</a> <a href="https://techhub.social/tags/orogeny" class="mention hashtag" rel="nofollow noopener" target="_blank">#orogeny</a>

Vicky VeritasThe Wilson Cycle Illustration: No Rock is AccidentalI had to share this much better picture of the Wilson Cycle with a volcanic island arc and double subduction. All the details are beautifully labelled. Gorgeous work, and the Wilson cycle still fits.Image from: <a href="https://www.semanticscholar.org/paper/No-Rock-Is-Accidental!-Stratigraphy%2C-Structure%2C-and-Fichter-Whitmeyer/dc9f2638a08d4193fb887854024525dd7459d953" rel="nofollow noopener" target="_blank">https://www.semanticscholar.org/paper/No-Rock-Is-Accidental!-Stratigraphy%2C-Structure%2C-and-Fichter-Whitmeyer/dc9f2638a08d4193fb887854024525dd7459d953</a>Recap on Wilson Cycle: <a href="https://c.im/@vickyveritas/109623604569764070" rel="nofollow noopener" target="_blank">https://c.im/@vickyveritas/109623604569764070</a><a href="https://c.im/tags/TheWilsonCycle" class="mention hashtag" rel="nofollow noopener" target="_blank">#TheWilsonCycle</a> <a href="https://c.im/tags/Rocks" class="mention hashtag" rel="nofollow noopener" target="_blank">#Rocks</a> <a href="https://c.im/tags/geology" class="mention hashtag" rel="nofollow noopener" target="_blank">#geology</a> <a href="https://c.im/tags/subduction" class="mention hashtag" rel="nofollow noopener" target="_blank">#subduction</a> <a href="https://c.im/tags/ScienceMastodon" class="mention hashtag" rel="nofollow noopener" target="_blank">#ScienceMastodon</a> @geology

Jascha PoletUnexpected focal mechanism for M7.0 earthquake near <a href="https://mastodon.social/tags/Solomon" class="mention hashtag" rel="nofollow noopener" target="_blank">#Solomon</a> Islands. I would have expected a shallow thrust <a href="https://mastodon.social/tags/earthquake" class="mention hashtag" rel="nofollow noopener" target="_blank">#earthquake</a> on the <a href="https://mastodon.social/tags/subduction" class="mention hashtag" rel="nofollow noopener" target="_blank">#subduction</a> interface, but it appear to be a steep <a href="https://mastodon.social/tags/normal" class="mention hashtag" rel="nofollow noopener" target="_blank">#normal</a> <a href="https://mastodon.social/tags/faulting" class="mention hashtag" rel="nofollow noopener" target="_blank">#faulting</a> event. As of yet, only possible <a href="https://mastodon.social/tags/tsunami" class="mention hashtag" rel="nofollow noopener" target="_blank">#tsunami</a> waves on the nearby Honiara sea level station are a few cms in amplitude.

Jascha PoletToday’s M6.9 shallow <a href="https://mastodon.social/tags/megathrust" class="mention hashtag" rel="nofollow noopener" target="_blank">#megathrust</a> <a href="https://mastodon.social/tags/earthquake" class="mention hashtag" rel="nofollow noopener" target="_blank">#earthquake</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">#rupture</a> areas of (numerous) previous <a href="https://mastodon.social/tags/subduction" class="mention hashtag" rel="nofollow noopener" target="_blank">#subduction</a> events near <a href="https://mastodon.social/tags/Sumatra" class="mention hashtag" rel="nofollow noopener" target="_blank">#Sumatra</a> on a map from Putra et al. (2016)

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