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Frictional afterslip following the 2005 Nias-Simeulue earthquake, Sumatra.

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Frictional afterslip following the 2005 Nias-Simeulue earthquake, Sumatra.

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Title: Frictional afterslip following the 2005 Nias-Simeulue earthquake, Sumatra.
Author: Hsu, Ya-Ju.; Simons, Mark.; Avouac, Jean-Philippe.; Galetzka, John.; Sieh, Kerry.; Chlieh, Mohamed.; Natawidjaja, Danny H.; Prawirodirdjo, Linette.; Bock, Yehuda.
Copyright year: 2006
Abstract: Continuously recording Global Positioning System stations near the 28 March 2005 rupture of the Sunda megathrust [moment magnitude (Mw) 8.7] show that the earthquake triggered aseismic frictional afterslip on the subduction megathrust, with a major fraction of this slip in the up-dip direction from the main rupture. Eleven months after the main shock, afterslip continues at rates several times the average interseismic rate, resulting in deformation equivalent to at least a Mw 8.2 earthquake. In general, along-strike variations in frictional behavior appear to persist over multiple earthquake cycles. Aftershocks cluster along the boundary between the region of coseismic slip and the up-dip creeping zone. We observe that the cumulative number of aftershocks increases linearly with postseismic displacements; this finding suggests that the temporal evolution of aftershocks is governed by afterslip.
Subject: DRNTU::Science::Geology::Volcanoes and earthquakes.
Type: Journal Article
Series/ Journal Title: Science
Rights: © 2006 American Association for the Advancement of Science.

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