The ‘Big One’ just got more complicated
Scientists have discovered a massive tear in the tectonic plate off the coast of Vancouver Island. This "rip" suggests that the northern end of the Cascadia Subduction Zone is actually starting to shut down. The CBC’s Johanna Wagstaffe investigates what this discovery might mean for the "Big One" off the coast of Vancouver Island.
#discovery #tectonic #cascadia #subduction #VancouverIsland
https://www.cbc.ca/player/play/9.7107713?cmp=rss

Timing And Style Of Tectonic Assembly And Exhumation Of The Mchugh Complex Within The Chugach-Kodiak Accretionary Wedge, Alaska
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https://doi.org/10.1029/2025TC009004 <-- shared paper
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https://discoveryalert.com.au/chugach-prince-william-terrain-geology-alaska-2025 <-- shared technical article
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[this paper is WAY over my head in terms of the nuance of structural geology, but still fascinating; further, I have to say: these are TRULY gorgeous, well-designed & presented, and useful geologic maps, cross-sections, annotated photographs and other visualisations (I am jealous of that level of skill, in the BEST of ways!)]
#geology #structuralgeology #fieldwork #geologic #mapping #KenaiPeninsula #McHughComplex #tectonics #underplating #faulting #subduction #erosion #Exhumation #ChugachKodiak #AccretionaryWedge #Alaska #coast #coastal #mineralogy #transects #crosssections #model #modeling #sampling #spectroscopy #accretionary #accretionarymargin #plateboundary #trench #interpretation #peneplanation #forearc

Slab Tearing Along A Subducted Oceanic Plate Joint Beneath The Alaska Peninsula
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https://doi.org/10.1038/s41561-025-01749-6 <-- shared paper
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#fault #faulting #subduction #slab #oceanic #plate #trench #Alaska #USA #geophysics #seismic #seismology #remotesensing #tomography #model #modeling #seismicity #volcano #vulcanism #Aniakchak #asthenosphere #geology #structuralgeology #mantle

Mid-Proterozoic Expansion Of Passive Margins And Reduction In Volcanic Outgassing Supported Marine Oxygenation And Eukaryogenesis
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https://doi.org/10.1016/j.epsl.2025.119683 <-- shared paper
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https://zenodo.org/records/17353904 <-- supplementary data
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#proterozoic #platetectonics #tectonics #deepcarboncycle #eukaryogenesis #evolutionoflife #life #evolution #geology #geologichistory #pangea #supercontinent #diversification #volcanic #offgassing #marine #thermodynamics #model #modeling #spatialanalysis #spatiotemporal #nuna #subduction #structuralgeology #CO2 #carbondioxide #climate #eukaryotic #BoringBillion #rodinia #oceanbasins #marinechemistry #outgassing #global #earth

Unravelling The Dance Of Earthquakes - Evidence Of Partial Synchronization Of The Northern San Andreas Fault And Cascadia Megathrust
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https://doi.org/10.1130/GES02857.1 <-- shared paper
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“Previous paleoseismic work has suggested a possible stress triggering relationship between the Cascadia subduction zone and the northern San Andreas fault based on similar event timings. Turbidite successions correlated to both systems may support this hypothesis. Historic earthquakes in 1980 and 1992 in the Cascadia subduction zone and the 1906 earthquake on the northern San Andreas fault left turbidite records that are temporally well constrained by bomb-carbon−supported age-depth models..."
#geology #USWest #Seattle #Washington #California #earthquake #engineeringeology #fault #faulting #SanAndreas #Cascadiasubductionzone #linked #Cascadia #research #sediment #sedimentology #Turbidite #paleoseismology #historic #spatial #spatialanalysis #spatiotemporal #model #modeling #stress #subduction #dating #radiocarbon #Holocene

Non-Collisional Orogeny In Northeast Japan Driven By Nearby Same-Dip Double Subduction
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https://doi.org/10.1038/s41561-025-01704-5 <-- shared paper
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#geology #structuralgeology #japan #subduction #system #plate #geometry #mantle #tectonics #geodynamics #orogeny #Ryukyu #IzuBoninMarianas #kinematics #backarc #earthquake #fault #faulting #orogenesis #platetectonics

Increased Flood Exposure In The Pacific Northwest Following Earthquake-Driven Subsidence And Sea-Level Rise
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https://doi.org/10.1073/pnas.2424659122 <-- shared paper
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https://oregoncapitalchronicle.com/2025/05/02/big-one-coupled-with-rising-ocean-could-leave-many-in-northwest-living-in-flood-zones-study-finds/ <-- shared media article
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#GIS #spatial #mapping #coast #coastal #sealevelrise #sealevel #SLR #climatechange #PNW #PacificNorthWest #Cascadia #flood #flooding #risk #hazard #exposure #damage #infrastructure #publicsafety #geology #fault #faulting #engineeringgeology #subsidence #earthquake #floodplains #omgoing #spatialanalysis #model #deformation #modeling #roads #residents ##Washington #Oregon #California #subduction #communities #management #planning #mitigation #coastalengineering #sinking