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Modeling the seismic cycle in subduction zones: The role and spatiotemporal occurrence of off-megathrust earthquakes [PDF]

Geophysical Research Letters, 2014
Shallow off-megathrust subduction events are important in terms of hazard assessment and coseismic energy budget. Their role and spatiotemporal occurrence, however, remain poorly understood.
Taras Gerya, Ylona van Dinther, Paul Martin Mai   +2 more
exaly   +2 more sources

Alaska megathrust 1: Seismicity 43 years after the great 1964 Alaska megathrust earthquake [PDF]

Journal of Geophysical Research: Solid Earth, 2013
AbstractThe largest moment release during the 1964 Mw 9.2 Alaska earthquake was on the portion of the megathrust under the eastern Kenai Peninsula and the Prince William Sound. The area is currently locked geodetically and corresponds to where the Yakutat terrane is subducting.
YoungHee Kim, Geoffrey A Abers
exaly   +2 more sources

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Dynamic lithospheric response to megathrust and precursory seismicity features of megathrust

Physics of the Earth and Planetary Interiors, 2014
Abstract Temporal variations of seismic properties in inner trench regions before and after three megathrusts with magnitudes greater than or equal to 8.8 since 2004 are investigated to understand the nature of megathrust earthquakes. The seismicity was increased significantly, and the fault-type compositions changed after megathrusts. The seismicity
Junhyung Lee, Tae-Kyung Hong
openaire   +1 more source

Weakening basaltic megathrusts

Nature Reviews Earth & Environment, 2021
An article in JGR Solid Earth identified that basalt-hosted megathrusts are not necessarily the nucleation source of large megathrust earthquakes.
openaire   +1 more source

Geometric controls on megathrust earthquakes

Geophysical Journal International, 2020
SUMMARY The role of subduction zone geometry in the nucleation and propagation of great-sized earthquake ruptures is an important topic for earthquake hazard, since knowing how big an earthquake can be on a given fault is fundamentally important. Past studies have shown subducting bathymetric features (e.g.
Steven M Plescia, Gavin P Hayes
openaire   +1 more source

Investigating a tsunamigenic megathrust earthquake in the Japan Trench

Science, 2021
The legacy of Tohoku-oki Ten years ago, the magnitude 9 Tohoku-oki earthquake rocked Japan and caused massive damage. The earthquake also generated a destructive tsunami, the impacts of which are still being managed today. Kodaira et al.
Shuichi Kodaira, Takeshi Iinuma, Kentaro Imai   +2 more
openaire   +2 more sources

Alaska Megathrust 2: Imaging the megathrust zone and Yakutat/Pacific plate interface in the Alaska subduction zone [PDF]

Journal of Geophysical Research: Solid Earth, 2014
AbstractWe image the slab underneath a 450 km long transect of the Alaska subduction zone to investigate (1) the geometry and velocity structure of the downgoing plate and their relationship to slab seismicity and (2) the interplate coupled zone where the great 1964 earthquake (Mw 9.2) exhibited the largest amount of rupture.
YoungHee Kim, Geoffrey A Abers, Stéphane Rondenay   +2 more
exaly   +2 more sources

Silent Heralds of Megathrust Earthquakes?

Science, 2004
D uring an earthquake, rupture propagates along the fault plane within a few tens of seconds. Much slower rupture, lasting for weeks or months, has recently been observed in slip transients or slow earthquakes ([1][1], [2][2]).
Alfred Hirn, Mireille Laigle
openaire   +1 more source

THE SUNDA MEGATHRUST — PAST, PRESENT AND FUTURE

Journal of Earthquake and Tsunami, 2007
After lying dormant for about a thousand years, sudden slippage of a 1600-km long section of the Sunda megathrust fault caused uplift of the seafloor between Aceh and Myanmar, resulting in a great earthquake and the horrific Indian Ocean tsunami of 2004.
openaire   +2 more sources

Subslab heterogeneity and giant megathrust earthquakes

Nature Geoscience, 2021
The nucleation and rupture processes of giant megathrust earthquakes (M ≥ 9.0) in subduction zones are still controversial. Most previous studies have focused on the subducting plate interface, and the structure beneath the subducting slab and its influence on earthquake generation remain unclear.
Jianke Fan, Dapeng Zhao
openaire   +1 more source