Results 31 to 40 of about 389 (172)

Methane Plume Emissions Associated With Puget Sound Faults in the Cascadia Forearc

Geochemistry, Geophysics, Geosystems, 2022
Methane gas plumes have been discovered to issue from the seafloor in the Puget Sound estuary. These gas emission sites are co‐located over traces of three major fault zones that fracture the entire forearc crust of the Cascadia Subduction Zone ...
H. Paul Johnson, Susan G. Merle, Tor A. Bjorklund, Susan L. Hautala, Tamara Baumberger, Sharon L. Walker, Junzhe Liu, Nicholas D. Ward, Chenyu Wang   +8 more
doaj   +1 more source

IODP Expedition 328: Early Results of Cascadia Subduction Zone ACORK Observatory [PDF]

Scientific Drilling, 2012
Integrated Ocean Drilling Program (IODP) Expedition 328 was devoted to the installation of an "Advanced CORK" (Circulation Obviation Retrofit Kit) in the Cascadia subduction zone accretionary prism to observe the physical state and properties of the ...
E. Davis, M. Heesemann, the IODP Expedition 328 Scientists and Engineers   +2 more
doaj   +3 more sources

Bidirectional Loading of the Subduction Interface: Evidence From the Kinematics of Slow Slip Events

Geochemistry, Geophysics, Geosystems, 2020
Subduction zones host some of Earth's most damaging natural hazards, including megathrust earthquakes and earthquake‐induced tsunamis. A major control on the initiation and rupture characteristics of subduction megathrust earthquakes is how the coupled ...
K. A. McKenzie, K. P. Furlong, M. W. Herman   +2 more
doaj   +1 more source

Rotation and plate locking at the Southern Cascadia Subduction Zone [PDF]

Geophysical Research Letters, 2000
Global Positioning System vectors and surface tilt rates are inverted simultaneously for the rotation of western Oregon and plate locking on the southern Cascadia subduction thrust fault. Plate locking appears to be largely offshore, consistent with earlier studies, and is sufficient to allow occasional great earthquakes inferred from geology ...
Robert McCaffrey, Maureen D. Long, Chris Goldfinger, Peter C. Zwick, John L. Nabelek, Cheryl K. Johnson, Curt Smith   +6 more
openaire   +1 more source

Commentary: The Role of Geodetic Algorithms for Earthquake Early Warning in Cascadia

Geophysical Research Letters, 2021
The ShakeAlert earthquake early warning (EEW) system issues public alerts in California and will soon extend to Oregon and Washington. The Cascadia subduction zone presents significant new challenges and opportunities for EEW.
Jeffrey J. McGuire, Sarah E. Minson, Jessica R. Murray, Benjamin A. Brooks   +3 more
doaj   +1 more source

A Long‐Term View of Episodic Tremor and Slip in Cascadia

Geophysical Research Letters, 2020
Episodic Tremor and Slip, or ETS, is a well‐recognized phenomenon in the Cascadia subduction zone. Constraining the precise location of geodetically measured slip during ETS is important for clarifying the relationship between slip and tremor during ETS,
Noel M. Bartlow
doaj   +1 more source

Inner forearc faults in northern Cascadia do not accommodate elastic strain driven by the megathrust seismic cycle

Seismica
We employ numerical models to explore the connection between subduction zone coupling or megathrust rupture and upper plate faults in the northern Cascadia forearc.
Nicolas Harrichhausen, Kristin D Morell, Christine Regalla   +2 more
doaj   +1 more source

Building a Continental‐Scale Geodetic Network: The Plate Boundary Observatory (PBO)

Perspectives of Earth and Space Scientists, Volume 7, Issue 1, December 2026.
Abstract The Plate Boundary Observatory (PBO) transformed the use of geodesy in North America to study crustal deformation and plate boundary processes by establishing a continental‐scale, standardized, open‐access geodetic network. Built and operated by UNAVCO between 2003 and 2018 as part of the National Science Foundation (NSF)‐funded EarthScope ...
Emily E. Zawacki, Michael E. Jackson, Glen S. Mattioli, David J. Mencin, Karl Feaux, Donna J. Charlevoix   +5 more
wiley   +1 more source

Along-strike changes in ETS behavior near the slab edge of Southern Cascadia

Seismica
Episodic tremor and slip (ETS) is well-documented along the entire length of the Cascadia subduction zone. We explore how the occurrence of ETS varies at the southernmost edge of the subduction zone, where geometric complexity and a slab window likely ...
Carolyn Nuyen, David Schmidt
doaj   +1 more source

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