Cascadia Subduction Zone Residents’ Tsunami Evacuation Expectations
Geosciences, 2022 The U.S. Pacific Northwest coast must be prepared to evacuate immediately after a Cascadia Subduction Zone earthquake. This requires coastal residents to understand the tsunami threat, have accurate expectations about warning sources, engage in preimpact
Michael K. Lindell +2 more
doaj +2 more sources
Anisotropic tomography of the Cascadia subduction zone
Physics of the Earth and Planetary Interiors, 2021 Abstract The first P-wave tomography of 3-D azimuthal and radial anisotropy of the Cascadia subduction zone is determined by inverting local and teleseismic arrival-time data. Fast-velocity directions (FVDs) of azimuthal anisotropy in the crust are generally trench-parallel, reflecting N-S compression along the Cascadia margin. Radial anisotropy (RAN)
Dapeng Zhao, Yuanyuan Hua
exaly +2 more sources
A new chronology for tsunami deposits prior to the 1700 CE Cascadia earthquake from Vancouver Island, Canada [PDF]
Scientific Reports, 2022 Coastal deposits at Tofino, Ucluelet, and Port Alberni in Vancouver Island along the Cascadia subduction zone were re-examined to improve the earthquake history of the southwest coast of Canada.
Koichiro Tanigawa +6 more
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Cascadia low frequency earthquakes at the base of an overpressured subduction shear zone [PDF]
Nature Communications, 2020 Regions of the subducting oceanic crust are often considered to be overpressured, owing to fluid trapped beneath an impermeable seal along the overlying inter-plate boundary.
Andrew J. Calvert +3 more
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Seismic evidence for melt-rich lithosphere-asthenosphere boundary beneath young slab at Cascadia [PDF]
Nature CommunicationsThe Lithosphere-Asthenosphere Boundary (LAB) beneath oceanic plates is generally imaged as a sharp seismic velocity reduction, suggesting the presence of partial melts.
Xin Wang +5 more
doaj +2 more sources
Geophysical Research Letters, 2021 Within the fore‐arc of the Cascadia Subduction Zone, there are significant along‐strike differences in the orientation of splay faults, sediment consolidation, and fault roughness.
Khurram S. Aslam +2 more
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Tectonic evolution of the Nootka fault zone and deformation of the shallow subducted Explorer plate in northern Cascadia as revealed by earthquake distributions and seismic tomography [PDF]
Scientific Reports, 2023 At the northern Cascadia subduction zone, the subducting Explorer and Juan de Fuca plates interact across a transform deformation zone, known as the Nootka fault zone (NFZ).
Jesse Hutchinson +7 more
doaj +2 more sources
Role of plate convergence rate in shaping earthquake recurrence in subduction zones [PDF]
Scientific ReportsUnderstanding the complex interplay of subduction zone processes is key to unravelling the timing and distribution of great earthquake cycles within the framework of the plate tectonics paradigm.
Sayak Ray +4 more
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Filling the Gap in Cascadia: The Emergence of Low‐Amplitude Long‐Term Slow Slip
Geochemistry, Geophysics, Geosystems, 2021 Long‐term slow slip events have been observed at several subduction zones around the globe, where they play an integral part in strain release along megathrust faults.
Carolyn P. Nuyen, David A. Schmidt
doaj +1 more source
Geoscience Letters, 2023 Earthquake occurrence modeling of large subduction events involves significant uncertainty, stemming from the scarcity of geological data and inaccuracy of dating techniques.
Katsuichiro Goda
doaj +1 more source