Results 81 to 90 of about 950 (179)

Do Coupled Megathrusts Rupture?

Megathrust earthquakes are among the most destructive and least predictable natural hazards. Kinematic geodetic coupling models, which identify regions of the plate interface where interseismic strain accumulates, are essential for seismic and tsunami hazard assessment.
Bar Oryan, Alice-Agnes Gabriel
openaire   +1 more source

Impact of Upper‐Plate Faulting on Megathrust Foreshocks: Insights From the 2014 Iquique Earthquake

Geophysical Research Letters
The role of upper‐plate faulting in the seismic cycle of large megathrust earthquakes remains poorly understood. We use quasi‐dynamic numerical simulations of seismic cycles to analyze the interaction between crustal faulting and the foreshock sequence ...
J. Julve, M. Moreno, S. Barbot, A. Tassara   +3 more
doaj   +1 more source

Seismic‐afterslip characterization of the 2010 MW 8.8 Maule, Chile, earthquake based on moment tensor inversion

Geophysical Research Letters, 2012
On February 27th 2010, a MW8.8 earthquake struck the coast of south‐central Chile, rupturing ∼500 km along the subduction interface. Here we estimate the amount of seismically‐released afterslip (SRA) and the mechanisms underlying the distribution of ...
Hans Agurto, Andreas Rietbrock, Isabelle Ryder, Matthew Miller   +3 more
doaj   +1 more source

An unexplained tsunami: Was there megathrust slip during the 2020 Mw7.6 Sand Point, Alaska, earthquake?

Seismica
On October 19, 2020, the Mw7.6 Sand Point earthquake struck south of the Shumagin Islands in Alaska. Moment tensors indicate the earthquake was primarily strike-slip, yet the event produced an enigmatic tsunami that was larger and more widespread than ...
Sean Santellanes, Dara Goldberg, Pablo Koch, Diego Melgar, William Yeck, Brendan Crowell, Jiun-Ting Lin   +6 more
doaj   +1 more source

On Dislocation Modeling of Megathrust Tsunami Sources

Journal of Geophysical Research: Solid Earth
AbstractModeling tsunamis due to subduction earthquakes for scientific research and hazard assessment requires accurate quantification of coseismic seafloor deformation. Although the widely used analytical model of shear dislocation in a uniform elastic half space can accommodate complex fault geometry and slip distribution, it fails to capture the ...
Yijie Zhu, Kelin Wang, Tianhaozhe Sun, Matias Carvajal, Jiangheng He   +4 more
openaire   +1 more source

Linking Interseismic Locking to Coseismic Rupture: The 2025 Mw 8.8 Kamchatka Earthquake

Geophysical Research Letters
We investigate interseismic locking on the Kamchatka megathrust, source of the 2025 Mw 8.8 earthquake, using a data‐driven probabilistic framework. Horizontal GNSS velocities constrain a boundary element model on a triangulated megathrust geometry, while
Axel J. Periollat, Gareth J. Funning
doaj   +1 more source

Publisher Correction: Megathrusts exhumed [PDF]

Nature Geoscience, 2021
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Downdip Variations in Megathrust Seismogenic Behavior in the Japan Trench Subduction Zone Affected by Mantle Wedge Serpentinite

Geophysical Research Letters
It is important to seek geological context for the geophysically observed downdip segmentation of seismogenic behavior of subduction megathrusts. Here we focus on how mantle wedge serpentinite may affect megathrust seismogenesis at Japan Trench—an end ...
Kelin Wang, Jiangheng He
doaj   +1 more source

Subduction zone megathrust earthquakes [PDF]

Geosphere, 2018
Susan L. Bilek, Thorne Lay
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Coseismic Slip and Early Afterslip of the 2024 Hyuganada Earthquake Modulated by a Subducted Seamount

Geophysical Research Letters
Subducted rough topography complicates seismic and aseismic slip behavior. The 2024 M 7.1 Hyuganada earthquake occurred along the megathrust with ridge subduction.
Yuji Itoh
doaj   +1 more source