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Investigating a tsunamigenic megathrust earthquake in the Japan Trench
Science, 2021The 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 +2 more
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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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Empirical nonlinear site effects in Japanese megathrust earthquakes
Earthquake Spectra, 2022In the course of developing ground-motion models (GMMs) of peak ground acceleration (PGA) for Japanese megathrust earthquakes, we discovered that empirical nonlinear site effects from these events are very different from those found for shallow crustal earthquakes in California and other global active tectonic regions.
Kenneth W Campbell +3 more
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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 +4 more
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Megathrust earthquake swarms indicate frictional changes which delimit large earthquake ruptures
Earth and Planetary Science Letters, 2014Abstract Using a recently constructed catalog of megathrust earthquake swarms, we present results that illustrate how fault slip for M w ⩾ 8.5 earthquakes with a publicly available finite fault rupture model is delimited along-strike by swarm regions.
Stephen Holtkamp, Michael R. Brudzinski
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Enhancement of Interplate Coupling after Recent Megathrust Earthquakes
2020<p>Enhanced interplate coupling has been found for segments adjacent along-strike to megathrust faults after the 2003 Tokachi-Oki and the 2011 Tohoku-Oki earthquakes, NE Japan, and was interpreted as acceleration of the subducting Pacific Plate slab.
Mohammad Yuzariyadi, Kosuke Heki
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Reconstruction of 1852 Banda Arc megathrust earthquake and tsunami
Natural Hazards, 2016In 1852, a 5-min long earthquake struck the Banda Arc region of Indonesia that was felt over most of Indonesia. It caused uplift of new islands and sent a tsunami across the Banda Sea that reached a height of 8 m at Banda Neira and was also registered at Ambon, Saparua and other islands.
TszMan L. Fisher, Ron A. Harris
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Ground‐motion attenuation relationship for the Sumatran megathrust earthquakes
Earthquake Engineering & Structural Dynamics, 2009AbstractA representative attenuation relationship is one of the key components required in seismic hazard assessment of a region of interest. Attenuation relationships for peak ground acceleration, peak ground velocity and response spectral accelerations for Sumatran megathrust earthquakes, covering Mw up to 9.0, are derived based on synthetic ...
Kusnowidjaja Megawati, Tso‐Chien Pan
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Spatial Economic Modelling of Megathrust Earthquake in Japan
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 kilometers of the coastline in north and western Aceh. In this book, we examine the economic
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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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