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Geometric controls on megathrust earthquakes
Geophysical Journal International, 2020SUMMARY 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
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The super-interseismic phase of the megathrust earthquake cycle in Chile [PDF]
Geophysical Research Letters, 2017 AbstractAlong a subduction zone, great megathrust earthquakes recur either after long seismic gaps lasting several decades to centuries or over much shorter periods lasting hours to a few years when cascading successions of earthquakes rupture nearby segments of the fault.
Daniel Melnick +2 more
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Subslab heterogeneity and giant megathrust earthquakes
Nature Geoscience, 2021The 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
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Historical and recent large megathrust earthquakes in Chile
Tectonophysics, 2018 Abstract Recent earthquakes in Chile, 2014, Mw 8.2 Iquique, 2015, Mw 8.3 Illapel and 2016, Mw 7.6 Chiloe have put in evidence some problems with the straightforward application of ideas about seismic gaps, earthquake periodicity and the general forecast of large megathrust earthquakes.
Sergio Ruiz, Raül I. Madariaga
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Silent Heralds of Megathrust Earthquakes?
Science, 2004D 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
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Structural heterogeneity and megathrust earthquakes in Southwest Japan
Physics of the Earth and Planetary Interiors, 2020Abstract Large interplate megathrust earthquakes occurred in the Nankai subduction zone off Southwest Japan with an interval of ~100 to 150 years. Because of a fast convergence rate (4–6 cm/yr) and a young buoyant lithosphere, the subducting Philippine Sea plate and the overriding Eurasian plate are strongly coupled in the forearc region along the ...
Xiongwei Niu, Yukio Isozaki, Dapeng Zhao
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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
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Triggering of earthquake swarms following the 2011 Tohoku megathrust earthquake
Journal of Geophysical Research: Solid Earth, 2015AbstractEarthquake swarms, often interpreted to result from fluids invading the brittle seismogenic zone, have seismicity patterns that are significantly different from an aftershock sequence. Following the Mw 9.0 Tohoku‐Oki earthquake, an unusual, shallow normal‐faulting swarm sequence occurred near the Pacific coast in the southeast Tohoku district ...
Koji Umeda +4 more
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A Spatial and Economic Analysis of Megathrust Earthquakes
2017The Great East Japan Earthquake, which struck on March 11, 2011, had a massive economic impact, primarily on the affected areas in Japan. The Indian Ocean Tsunami hit Aceh and Nias, Indonesia, on December 26, 2004 and destroyed life and infrastructure within 10 km of the coastline in north and western Aceh.
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Moment tensors for rapid characterization of megathrust earthquakes
2013The rapid detection and characterization of megathrust earthquakes is a difficult task given their large rupture zone and duration. These events produce very strong ground vibrations in the near field that can cause weak motion instruments to clip, and they are also capable of generating large-scale tsunamis.
Guilhem, Aurélie +3 more
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