Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/94599
Title: Frictional afterslip following the 2005 Nias-Simeulue earthquake, Sumatra
Authors: Hsu, Ya-Ju
Simons, Mark
Avouac, Jean-Philippe
Galetzka, John
Sieh, Kerry
Chlieh, Mohamed
Natawidjaja, Danny H.
Prawirodirdjo, Linette
Bock, Yehuda
Keywords: DRNTU::Science::Geology::Volcanoes and earthquakes
Issue Date: 2006
Source: 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.
Series/Report no.: Science
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.
URI: https://hdl.handle.net/10356/94599
http://hdl.handle.net/10220/8671
DOI: 10.1126/science.1126960
Rights: © 2006 American Association for the Advancement of Science.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:EOS Journal Articles

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