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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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dc.contributor.author Hsu, Ya-Ju
dc.contributor.author Simons, Mark
dc.contributor.author Avouac, Jean-Philippe
dc.contributor.author Galetzka, John
dc.contributor.author Sieh, Kerry
dc.contributor.author Chlieh, Mohamed
dc.contributor.author Natawidjaja, Danny H.
dc.contributor.author Prawirodirdjo, Linette
dc.contributor.author Bock, Yehuda
dc.date.accessioned 2012-09-28T06:50:05Z
dc.date.available 2012-09-28T06:50:05Z
dc.date.copyright 2006
dc.date.issued 2012-09-28
dc.identifier.citation Hsu, Y. J., Simons, M., Avouac, J. P., Galetzka, J., Sieh, K., Chlieh, M., et al. (2006). Frictional afterslip following the 2005 Nias-Simeulue earthquake, Sumatra. Science, 312(5782), 1921-1926.
dc.identifier.uri http://hdl.handle.net/10220/8671
dc.description.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.
dc.language.iso en
dc.relation.ispartofseries Science
dc.rights © 2006 American Association for the Advancement of Science.
dc.subject DRNTU::Science::Geology::Volcanoes and earthquakes
dc.title Frictional afterslip following the 2005 Nias-Simeulue earthquake, Sumatra
dc.type Journal Article
dc.identifier.doi http://dx.doi.org/10.1126/science.1126960

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