#ecsmonday

Strongly coupled volcanic arc 🌋 meets weakly coupled subduction 🌊: Portela et al. (ES) find slab coupling Φ≈0.2 offshore El Salvador, strengthening westward into Guatemala

doi.org/10.5194/se-17-369-2026

#subduction #plateboundaries #geohazards #paperalert

Happy to share our paper on Coupled Tectonic and Surface Processes at EPSL - years of work!
#Tectonics #EarthSurface #Subduction #Fault

doi.org/10.1016/j.ep...

How much do you know about earthquakes? Find out with this fun little 10-question quiz in the intellectual playground at 500ways.com/earthquake-q... ( #earthquake, #temblor, #seismic, #tectonic, #quake, #fracking, #subduction, #quiz, #trivia)

Kyanite Exsolution Reveals Ultra-Deep Subduction of Continents These figures show microscopic images from high-pressure experiments that show how kyanite separates out from silica minerals during decompression. Across experiments from 10 to 8 GPa (Gigapascal), kyanite forms as small rod-shaped and granular crystals within and along grain boundaries of stishovite and coesite grains, often growing in more than one crystallographic direction. These textures demonstrate that kyanite exsolution occurs during pressure release and can be preserved as the host mineral transforms. Abbreviations: St = stishovite; Coe = coesite; Ky = kyanite. Credit: Li et al. [2025], Figure 2a-d

His topics are broad from #subduction zones to #extremeevents 🌪️, the interplay between landscapes and aquatic species, by linking #fieldwork, quantitative analysis and #numericalmodelling. (2/2)

Want to know more? Register here 🚨 www.steepestdescentmeeting.org

#EGU26 #Geosciences #Geomorphology

Happy Holidays everyone! Since today is Christmas Day, I thought I would post a #Christmas #rock from #Norway. #Eclogite is an ultra-high pressure rock created in #subduction zones (~90 km depth). It is made of #garnet (red) and #omphacite (green).

How much do you know about earthquakes? Find out with this fun little 10-question quiz in the intellectual playground at 500ways.com/earthquake-q... ( #earthquake, #temblor, #seismic, #tectonic, #quake, #fracking, #subduction, #quiz, #trivia)

Subduction Zone A subduction zone is a geological area where two tectonic plates collide, and one plate sinks or "subducts" beneath the other and is forced into the Earth's mantle.

A #Subduction zone is a geological area where two tectonic plates collide, and one plate sinks or "subducts" beneath the other and is forced into the Earth's mantle.

This process can trigger powerful #Earthquakes, volcanic eruptions, and #Tsunamis.

knowledgezone.co.in/kbits/69159c...

How much do you know about earthquakes? Find out with this fun little 10-question quiz in the intellectual playground at 500ways.com/earthquake-q... ( #earthquake, #temblor, #seismic, #tectonic, #quake, #fracking, #subduction, #quiz, #trivia)

[3/6] Ce processus ne se produit pas en 1 fois. La #subduction meurt par étapes successives, chaque fracture isolant des fragments qui deviennent des microplaques. Cette désintégration lente agit comme des "ciseaux naturels" redéfinissant les limites tectoniques au fil du temps. #geography

Excited to join #GSAConnects2025 with the @UNC_EMES team! EMES is proud to showcase research on subduction, orogens, climate, uplift, and more! Come find us, connect, and be part of the conversation! 🔥🗻
#GeoTwitter #Petrology #Subduction

Blue yoderite ( Mg(Al,Fe3+)3(SiO4)2O(OH) ) surrounding remnant kyanite with talc and quartz. Plane polarized transmitted light.

Yoderite surrounding remnant kyanite with talc and quartz. Cross polarized transmitted light.

Rare blue yoderite replacing kyanite (-talc + quartz). Only found in two places on Earth (Tanzania and Zimbabwe), yoderite forms at high pressure in hot subduction zones from rocks rich in in Mg and Al, poor in alkalis and Ca, in the presence of water and […]

[Original post on fosstodon.org]

Subduction Zone Breaks Apart Beneath Pacific Northwest

Scientists on the vessel Marcus G. Langseth captured a subduction slab tearing off Vancouver Island, showing a five‑kilometre drop across a 75‑km stretch. The finding refines Cascadia quake risk models. getnews.me/subduction-zone-breaks-a... #cascadia #subduction

Slab fragmentation and cessation of subduction enabled by the NFZ. Schematic 3D interpretation of the NFZ-Exp-JdF triple junction region in northern Cascadia where subduction termination is imminent. The paleo-NFZ (thin black lines) developed as a broad shear zone in nascent oceanic lithosphere and reactivated inherited abyssal hill faults formed at the ridge. The weakened lithosphere buckled as a trench-parallel slab tear formed at the northern edge of the Exp slab and migrated across the paleo-NFZ wake. Recent strain localization along the modern NFZ at ~1 Ma dissected the migrating slab tear and effectively isolated the Exp microplate, leading to enhanced tearing, decoupling, and a local reduction in the slab pull force. The NFZ thus serves as a trench-normal segmentation boundary enabling piecewise slab fragmentation and subduction termination.

[8/8] L’étude révèle qu’une #subduction ne s’effondre pas brutalement mais se défait lentement, laissant derrière elle microplaques et anomalies volcaniques. #Cascadia devient ainsi un laboratoire naturel pour comprendre la dynamique et le cycle de vie des plaques. #geography #earthquakes #PacificNW

Slab tearing and segmented subduction termination driven by transform tectonics Transform faults act as tectonic segmentation boundaries, enabling diachronous slab detachment and subduction termination.

[1/8] Des chercheurs montrent, grâce à des images sismiques inédites, qu’au large de l’île de Vancouver la subduction de la plaque Juan de Fuca est en train de se déchirer. #geography #tectonics #subduction #earthquakes #VancouverIsland #NootkaFZ #PacificNorthwest

How much do you know about earthquakes? Find out with this fun little 10-question quiz in the intellectual playground at 500ways.com/earthquake-q... ( #earthquake, #temblor, #seismic, #tectonic, #quake, #fracking, #subduction, #quiz, #trivia)

How much do you know about earthquakes? Find out with this fun little 10-question quiz in the intellectual playground at 500ways.com/earthquake-q... ( #earthquake, #temblor, #seismic, #tectonic, #quake, #fracking, #subduction, #quiz, #trivia)

map showing location of earthquake and thrust mechanism

map showing location of the second earthquake and thrust mechanism

A magnitude 6.8 foreshock followed by a magnitude 7.4 #earthquake 20 minutes later, offshore #Kamchatka.
Shallow hypocentral depths and thrust mechanisms point to a rupture on the #subduction #megathrust. ⚒️ 🧪

geoscope.ipgp.fr/index.php/en...

sheared serpentinite in thin section, FOV 2.5 mm

🚨PAPER ALERT🚨

This is a #serpentinite #shearzone.
It is part of a #subduction complex where oceanic serpentinites were subducted, sheared, carbonated, exhumed, and coupled with sediments that we recently described on the Island of Elba, Italy. A 3ad

#geology #RockInTuesday

1/x

You mean greed and ignorance put us all in danger?

#Oregon #Washington #cascadia #tsunami #subduction #PNW #earthquakes #earthquake #USGS #climatechange

youtu.be/89uVoIN5ZH4?...

Tectonic Plates Can ‘Infect’ One Another with Earth-Shaking Subduction Zones Evidence from Earth’s deep past suggests dramatic subduction zones can spread like a contagion

A cool example applying the concept of subduction invasion to past oceans:

www.scientificamerican.com/article/tect...

#geology #subduction #subductioninitiation #tectonics

Tectonic plates can spread subduction like a contagion — jumping from one oceanic plate to another Evidence from Earth's deep past suggests dramatic subduction zones can spread like a contagion.

Tectonic plates can spread subduction like a contagion — jumping from one oceanic plate to another #Science #EarthSciences #Geology #TectonicPlates #Subduction

How much do you know about earthquakes? Find out with this fun little 10-question quiz at 500ways.com/earthquake-q... (#earthquake, #temblor, #seismic, #tectonic, #quake, #fracking, #subduction, #quiz, #trivia)

Non-Collisional Orogeny In Northeast Japan Driven By Nearby Same-Dip Double Subduction
-
tinyurl.com/38k4ykry
-
#geology #structuralgeology #japan #subduction #system #plate #geometry #mantle #tectonics #geodynamics #orogeny #Ryukyu #kinematics #backarc #earthquake #fault #faulting #platetectonics

Oil painting: Subduction (11 x 14) Oil painting: Subduction (11 x 14)

#Oil #painting: #Subduction (11 x 14)

www.wakingmeta.com/2025/05/oil-...

"There also has not been a quake of large seismic magnitude along the #Cascadia #subduction zone since 1700" #earthquake #bcpoli
#tectonics
www.independent.co.uk/news/world/a...

SciTech Chronicles. . . . . . . . .May 17th, 2025 If you don't want your tax dollars to help the poor then stop saying that you want a country based on Christian values. Vol II No 40 330 l...

SciTech Chronicles. . . . . . . . .May 17th, 2025

bit.ly/stc051725

#volcanoes #Io #collision #gravitational #AMOC #dilution #mass #expansion #sediment #cooling #ice-sheet #AMOC #Negev #pendants #child #"Tel Malḥata" #SAR #Magellan #metamorphism #subduction

How much do you know about earthquakes? Find out with this fun little 10-question quiz at 500ways.com/earthquake-q... (#earthquake, #temblor, #seismic, #tectonic, #quake, #fracking, #subduction, #quiz, #trivia)

Sink or Swim: The Fate of Sinking Tectonic Plates Depends on Their Ancient Tectonic Histories | Newswise New findings provide a greater understanding of plate subduction, or how tectonic plates slide beneath one another This recycling of surface materials and volatile elements deep into the Earth's inter...

Sink or Swim: The Fate of Sinking Tectonic Plates Depends on Their Ancient Tectonic Histories
www.newswise.com/articles/sin...
#tectonicplates #subduction #oceanscience #science #AncientDiscoveries