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Cascadia

All articles tagged with #cascadia

science26 days ago•7 min saved

Cascadia Subduction Zone Begins to Tear Itself Apart, Scientists Say

Scientists using the CASIE21 seismic program off Vancouver Island captured the Juan de Fuca plate tearing into fragments as it sinks beneath North America—a gradual, piecewise breakup with major tears (including a ~5 km drop and a ~75 km fault) that helps explain ancient plate remnants and will refine Cascadia earthquake hazard models. Despite these changes, the region remains capable of large earthquakes and tsunamis, though models will improve by incorporating the new details.

via ScienceDaily|

#cascadia #earthquakes #science

science26 days ago•6 min saved

Pacific Northwest Subduction Zone Breaks Apart, One Tear at a Time

A Science Advances study using high‑resolution seismic imaging from the CASIE21 expedition shows the Cascadia subduction zone off Vancouver Island tearing apart in stages, with a main fault dropping about five kilometers and smaller microplates forming as the Juan de Fuca plate gradually detaches. This episodic, piecewise termination clarifies how such zones die and will help refine seismic hazard models, though it does not indicate an imminent change in regional earthquake risk.

via Indian Defence Review|

#cascadia #earthquake-science #juan-de-fuca

$Cascadia crust tearing offshore: a 22-mile slab fracture near Vancouver Island$

science2 months ago•18 min saved

Cascadia crust tearing offshore: a 22-mile slab fracture near Vancouver Island

Researchers mapped a deep, 22‑mile tear forming in the Cascadia margin offshore Vancouver Island, where the Nootka Fault Zone is ripping a fragment from the downgoing plate. The tear could progress into a slab window and alter heat and melting patterns, but it does not change the region’s megathrust hazard yet; the finding helps scientists model how ruptures might propagate through a segmented boundary.

via Earth.com|

#cascadia #earthquakes #geology

science7 months ago•4 min saved

Pacific Northwest's Earthquake Rift Emerges

Scientists have directly observed a subduction zone off Vancouver Island in the process of breaking apart, revealing that such zones fail gradually through episodic tearing rather than catastrophic collapse, providing new insights into Earth's geological processes and earthquake hazards in the Pacific Northwest.

via Science Daily|

#cascadia #earthquake #geology

science11 months ago•4 min saved

Scientists Warn of Potential 1,000-Foot Mega-Tsunami Threat to U.S.

Scientists warn that a 1,000-foot mega-tsunami, similar to historical events like the 1958 Lituya Bay surge, could potentially occur in the U.S., especially along the Cascadia subduction zone, posing significant risks to coastal communities and inland areas through land subsidence and large wave generation. Enhanced monitoring and preparedness are crucial to mitigate impacts.

via Earth.com|

#cascadia #disaster-preparedness #earthquakes