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|Title:||Sibling earthquakes generated within a persistent rupture barrier on the Sunda megathrust under Simeulue Island||Authors:||Morgan, Paul M.
Meltzner, Aron Jeffrey
Lindsey, Eric Ostrom
Tsang, Louisa Lok Hang
Hill, Emma Mary
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
|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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