Results 91 to 100 of about 12,078 (235)

An exponential build-up in seismic energy suggests a months-long nucleation of slow slip in Cascadia

Nature Communications, 2020
Using machine learning algorithms, the authors here identify slow slip precursors in the Cascadia subduction zone to last for months - which in turn argues for a much better predictability of slow slip rupture.
Claudia Hulbert, Bertrand Rouet-Leduc, Romain Jolivet, Paul A. Johnson   +3 more
doaj   +1 more source

Seismicity, Repeating Earthquakes, and Tomographic Imaging of the Blanco Transform Fault System, Northeast Pacific

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 5, May 2026.
Abstract The Blanco transform fault system (BTFS) represents an evolving transform plate boundary in the Northeast Pacific Ocean. Its seismic behavior was captured with a dense network of 54 ocean‐bottom seismometers (OBS) operated for 1 year. We created a high‐resolution earthquake catalog based on different machine‐learning onset pickers.
D. Lange, Y. Ren, I. Grevemeyer
wiley   +1 more source

Depth-varying rupture properties of subduction zone megathrust faults [PDF]

, 2012
Subduction zone plate boundary megathrust faults accommodate relative plate motions with spatially varying sliding behavior. The 2004 Sumatra-Andaman (M_w 9.2), 2010 Chile (Mw 8.8), and 2011 Tohoku (M_w 9.0) great earthquakes had similar depth variations
Ammon, Charles J., Hutko, Alexander R., Kanamori, Hiroo, Koper, Keith D., Lay, Thorne, Rushing, Teresa M., Ye, Lingling, Yue, Han   +7 more
core   +1 more source

Rayleigh Waves From OHANA OBSs in the Northeast Pacific Ocean Reveal Low Deep Shear Velocities and Pervasive Azimuthal Anisotropy

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 5, May 2026.
Abstract The 2021–2023 OHANA ocean‐bottom seismometer deployment in the northeast Pacific Ocean provides a rich data set for seismic studies to explore the crust, lithosphere and asthenosphere in a 600 km wide region about 1,500 km northeast of Hawaii, west of the Moonless Mountains. The study area covers mainly 40‐to‐55 Myr‐old Pacific lithosphere.
Gabi Laske, Grace Atkisson, John A. Collins, Donna K. Blackman   +3 more
wiley   +1 more source

GPS constraints on 34 slow slip events within the Cascadia subduction zone, 1997–2005 [PDF]

, 2008
Refinements to GPS analyses in which we factor geodetic time series to better estimate both reference frames and transient deformation resolve 34 slow slip events located throughout the Cascadia subduction zone from 1997 through 2005. Timing of transient
Blewitt, Blewitt, Dong, Dragert, Dragert, Efron, Flück, Golub, Hirose, Hyndman, Ide, Ito, Kao, Kawasaki, Kostoglodov, Langbein, Larson, Lawson, Lowry, M. Miller, M. Santillan, Mao, McCausland, Miller, Miller, Mitchell, Nikolaidis, Obara, Ohta, Ozawa, Ozawa, Rogers, Royle, Shelly, Szeliga, T. Melbourne, Torrence, W. Szeliga, Zumberge   +38 more
core   +2 more sources

Nine‐Year L‐Band InSAR Time Series of Tectonic and Non‐Tectonic Surface Deformation in Northern California

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 5, May 2026.
Abstract This study evaluates the performance of ALOS‐2 ScanSAR time series for resolving tectonic, volcanic, hydrologic, and geomorphic deformation across Northern California. Beginning in 2021, ALOS‐2 acquired ScanSAR data with a 14‐day repeat interval over the region, providing the closest available analog to the recently launched NISAR mission. The
D. Lindsay, R. Bürgmann, K. Materna, E. J. Fielding   +3 more
wiley   +1 more source

Upward delamination of Cascadia Basin sediment infill with landward frontal accretion thrusting caused by rapid glacial age material flux [PDF]

, 2004
The Cascadia convergent margin is a first-order research target to study the impact of rapid sedimentation processes on the mechanics of frontal subduction zone accretion.
Applegate, Bangs, Banks, Barnard, Black, Boyer, Bray, Butler, Byerlee, Byrne, Byrne, Calvert, Carson, Charlesworth, Clague, Couzens, Dahlen, Dahlen, Dahlen, Davis, Davis, Davis, DeMets, Dirk Klaeschen, Duncan, Elliott, Epard, Ernst Flueh, Fisher, Flueh, Flueh, Guo, Gutscher, Hyndman, Jamison, Juergen Adam, Karig, Khazaradze, Kukowski, Kukowski, Kulm, Kulm, Lallemand, Lehner, Lohrmann, MacKay, MacKay, Maltman, Mandl, Marone, McNeill, Morgan, Mulugeta, Nina Kukowski, O'Connor, O'Connor, Oleskevich, Platt, Ramos, Roeder, Satake, Seely, Silver, Snavely, Storti, Taira, von Huene, Ye, Zhao   +68 more
core   +1 more source

Fault Volume Digital Twin to Reproduce the Full Slip Spectrum, Scaling, and Statistical Laws

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 5, May 2026.
Abstract Seismological and geodetic observations of fault zones reveal diverse slip dynamics, scaling, and statistical laws. Existing mechanisms explain some but not all of these behaviors. We show that incorporating an off‐fault damage zone—characterized by distributed fractures surrounding a main fault—can reproduce many key features observed in ...
M. Almakari, N. Kheirdast, C. Villafuerte, M. Y. Thomas, P. Dubernet, J. Cheng, A. Gupta, P. Romanet, S. Chaillat, H. S. Bhat   +9 more
wiley   +1 more source

In situ measurements of thermal diffusivity in sediments of the methane-rich zone of Cascadia Margin, NE Pacific Ocean

Elementa: Science of the Anthropocene, 2015
Thermal diffusivity (TD) is a measure of the temperature response of a material to external thermal forcing. In this study, TD values for marine sediments were determined in situ at two locations on the Cascadia Margin using an instrumented sediment ...
Kira Homola, H. Paul Johnson, Casey Hearn   +2 more
doaj   +1 more source

Seismic Stratigraphy and Tectonic Evolution of the Forearc Georgia Basin (Upper Cretaceous–Miocene), Canada and USA, With Implications for CO2 Sequestration

Basin Research, Volume 38, Issue 3, May–June 2026.
2D seismic and well data reveal multi‐phase basin filling in the Whatcom Sub‐Basin shaped by syn‐depositional tectonism. An Eocene transition from forearc basin to forearc depression corresponds to decreasing normal‐fault density and throw, both upsection and eastward. Paleogene–Neogene strata are the best CO2 storage targets.
Francyne Bochi do Amarante, Shahin E. Dashtgard, Maziyar Nazemi, Andrew J. Calvert, H. Daniel Gibson   +4 more
wiley   +1 more source