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Soft barrier to megathrust rupture enabled by serpentinized mantle wedge: The Chile subduction zone
Earth and Planetary Science LettersHow temperature and petrology control the seismogenesis of the deeper megathrust and associated hazard is poorly understood. It was previously proposed that the serpentinized mantle wedge would limit seismic rupture, but modern observations show many ...
Kelin Wang, Haipeng Luo, Matias Carvajal
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Do coupled megathrusts rupture? A Global Comparison of Megathrust Coupling and Earthquake Slip
To assess seismic hazard along subduction zones, which host Earth’s largest earthquakes, geodesists routinely measure interseismic surface deformation rates and invert them to estimate distributions of slip deficit along the plate interface. The resulting geodetic coupling models highlight portions of the megathrust that are “locked” and accumulating ...Bar Oryan, Alice Gabriel
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The role of strain heating in the evolution of megathrusts
Journal of Geophysical Research: Solid Earth, 1986On the basis of elementary energy considerations and the nonlinear temperature dependence of experimental flow laws, a model is developed for the interplay of thermal and mechanical processes along megathrust systems. The model is based on the observation that thrust systems involving large portions of the lithosphere have a two‐part history.
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Strong yet creeping megathrust faults
Science, 2014Earthquake Dynamics Powerful faults in subduction zones, called “megathrust faults,” produce the largest earthquakes on Earth. Gao and Wang use heat flow data to show that when the faults subduct jagged sea floor, they generate tamer earthquakes than do faults that subduct smooth sea floor. The rugged sea floor brings irregularities into the fault that
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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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