Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/86298
Title: Sibling earthquakes generated within a persistent rupture barrier on the Sunda megathrust under Simeulue Island
Authors: Morgan, Paul M.
Feng, Lujia
Meltzner, Aron Jeffrey
Lindsey, Eric Ostrom
Tsang, Louisa Lok Hang
Hill, Emma Mary
Keywords: Fault morphology
Sumatran subduction zone
Issue Date: 2017
Source: Morgan, P. M., Feng, L., Meltzner, A. J., Lindsey, E. O., Tsang, L. L. H., & Hill, E. M. (2017). Sibling earthquakes generated within a persistent rupture barrier on the Sunda megathrust under Simeulue Island. Geophysical Research Letters, 44(5), 2159-2166.
Series/Report no.: Geophysical Research Letters
Abstract: A section of the Sunda megathrust underneath Simeulue is known to persistently halt rupture propagation of great earthquakes, including those in 2004 (Mw 9.2) and 2005 (Mw 8.6). Yet the same section generated large earthquakes in 2002 (Mw 7.3) and 2008 (Mw 7.4). To date, few studies have investigated the 2002 and 2008 events, and none have satisfactorily located or explained them. Using near-field InSAR, GPS, and coral geodetic data, we find that the slip distributions of the two events are not identical but do show a close resemblance and largely overlap. We thus consider these earthquakes “siblings” that were generated by an anomalous “parent” feature of the megathrust. We suggest that this parent feature is a locked asperity surrounded by the otherwise partially creeping Simeulue section, perhaps structurally controlled by a broad morphological high on the megathrust.
URI: https://hdl.handle.net/10356/86298
http://hdl.handle.net/10220/43973
ISSN: 0094-8276
DOI: http://dx.doi.org/10.1002/2016GL071901
Rights: © 2017 The Authors. This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:EOS Journal Articles

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