Results 51 to 60 of about 1,662 (207)

New constraints on subduction zone structure in northern Cascadia [PDF]

Geophysical Journal International, 2005
SUMMARY A detailed passive seismic experiment was carried out across southwestern British Columbia and northwestern Washington to investigate the structure of the subducting Juan de Fuca plate and mantle wedge in Cascadia and its relation to intraslab seismicity. As part of the POLARIS project, 31 three-component broad-band stations were deployed in an
T. Nicholson, M. Bostock, J. F. Cassidy
openaire   +1 more source

Evolution of Pore Fluid Pressure in an Accretionary Outer Wedge Over Megathrust Earthquake Cycles: The Northern Cascadia Example

New Zealand Journal of Geology and Geophysics, Volume 69, Issue 2, June 2026.
The evolution of pore fluid pressure ( Pf$P_{\mathrm{f}}$) in the most seaward portion of a subduction accretionary prism plays an essential role in the cycle of tsunamigenic earthquakes. Based on recent geophysical observations, here we propose a testable conceptual model for this evolution for northern Cascadia offshore of Washington.
Tianhaozhe Sun, Kelin Wang
wiley   +1 more source

Great earthquakes along the Western United States continental margin: implications for hazards, stratigraphy and turbidite lithology [PDF]

Natural Hazards and Earth System Sciences, 2012
We summarize the importance of great earthquakes (<i>M</i>_w &gtrsim; 8) for hazards, stratigraphy of basin floors, and turbidite lithology along the active tectonic continental margins of the Cascadia subduction ...
C. H. Nelson, J. Gutiérrez Pastor, C. Goldfinger, C. Escutia   +3 more
doaj   +1 more source

The United States Magnetotelluric Array and the National Impedance Map

Reviews of Geophysics, Volume 64, Issue 2, June 2026.
Abstract The United States Magnetotelluric Array (USMTArray) data set, collected in the years 2006–2024, consists of more than 1,700 long‐period magnetotelluric stations covering the entirety of the contiguous United States on a quasi‐regular 70 km grid.
Anna Kelbert, Paul A. Bedrosian, Adam Schultz, Gary D. Egbert, Louise Pellerin, Jeffrey J. Love, Andrew Frassetto, Benjamin S. Murphy   +7 more
wiley   +1 more source

Estimation of strong ground motions from hypothetical earthquakes on the Cascadia subduction zone, Pacific Northwest [PDF]

, 1986
Strong ground motions are estimated for the Pacific Northwest assuming that large shallow subduction earthquakes, similar to those experienced in southern Chile, southwestern Japan, and Colombia, may also occur on the Cascadia subduction zone.
Hartzell, Stephen H., Heaton, Thomas H., S.H. Hartzell, T.H. Heaton   +3 more
core   +2 more sources

A possible “window of escape” in the southern Cascadia subduction zone [PDF]

Geology, 2007
Understanding the forces and factors that are responsible for deforming the conti nental lithosphere remains a fundamental issue in geo physics. Deformation in continental plate boundary zones occurs over length scales of hundreds to thousands of kilometers, in contrast to oceanic plate boundaries,
openaire   +1 more source

New Insights Into Hikurangi Subduction Inputs and Megathrust Host Rocks Spanning Along‐Margin Changes in Fault Slip Behavior

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 6, June 2026.
Abstract The seismic behavior of subduction megathrusts varies spatially and is influenced by the properties of subducting plates, including their sedimentary cover. Characterizing these subduction inputs is essential for understanding the mechanisms behind fault slip variability.
Philip M. Barnes, Gareth J. Crutchley, Martin P. Crundwell, Stuart A. Henrys, Andrew Gase, Sam R. Davidson, Nathan Bangs, Harm Van Avendonk, Michael Underwood, Anthony E. Shorrock, Laura S. McDonald, Lorna J. Strachan, Helen C. Bostock   +12 more
wiley   +1 more source

Late Quaternary Surface Displacements on Accretionary Wedge Splay Faults in the Cascadia Subduction Zone: Implications for Megathrust Rupture

Seismica
Because splay faults branch at a steep dip angle from the plate-boundary décollement in an accretionary wedge, their coseismic displacement can potentially result in larger tsunamis with distinct characteristics compared to megathrust-only fault ruptures,
Anna Ledeczi, Madeleine Lucas, Harold Tobin, Janet Watt, Nathan Miller   +4 more
doaj   +1 more source

Body Wave Tomography of the Cascadia Subduction Zone and Juan de Fuca Plate System: Identifying Challenges and Solutions for Shore‐Crossing Data

Geochemistry, Geophysics, Geosystems, 2020
Recent seismic results from the Cascadia Initiative indicate that heterogeneity in the oceanic asthenosphere affects subduction dynamics. Accurate characterization of the oceanic upper mantle is thus necessary to fully understand subduction processes ...
M. Bodmer, D. R. Toomey, B. VanderBeek, E. E. Hooft, J. S. Byrnes   +4 more
doaj   +1 more source

Terrestrial Analogs to Titan for Geophysical Research

Reviews of Geophysics, Volume 64, Issue 2, June 2026.
Abstract Saturn's moon Titan exhibits remarkable parallels to the Earth in many geophysical and geological processes not found elsewhere in the solar system at the present day. These include a nitrogen atmosphere with a condensible gas—methane—replacing the Earth's water, leading to an active meteorology with rainfall and surface manifestations ...
Conor A. Nixon, Samuel Birch, Audrey Chatain, Charles Cockell, Kendra K. Farnsworth, Peter M. Higgins, Stéphane Le Mouélic, Rosaly M. C. Lopes, Michael J. Malaska, Mohit Melwani Daswani, Kelly E. Miller, Catherine D. Neish, Olaf G. Podlaha, Jani Radebaugh, Lauren R. Schurmeier, Ashley Schoenfeld, Krista M. Soderlund, Anezina Solomonidou, Christophe Sotin, Nicholas A. Teanby, Tetsuya Tokano, Steven D. Vance   +21 more
wiley   +1 more source