Please use this identifier to cite or link to this item:
Title: Another potential source of destructive earthquakes and tsunami offshore of Sumatra
Authors: Wiseman, Kelly
Banerjee, Paramesh
Sieh, Kerry
Bürgmann, Roland
Natawidjaja, Danny H.
Keywords: DRNTU::Science::Geology::Volcanoes and earthquakes
Issue Date: 2011
Source: Wiseman, K., Banerjee, P., Sieh, K., Bürgmann, R., & Natawidjaja, D. H. (2011). Another potential source of destructive earthquakes and tsunami offshore of Sumatra. Geophysical Research Letters, 38.
Series/Report no.: Geophysical research letters
Abstract: We link geodetic data from the Sumatran GPS Array (SuGAr) and earthquake focal mechanisms to show that a 900-km long backthrust, arising from the Sunda megathrust offshore of Sumatra, has recently become active following the series of great megathrust earthquakes of this past decade. Shallow failure of the Mentawai backthrust explains coseismic displacements during moderate-earthquake clusters in 2005 and 2009. These two clusters represent the first activity on the backthrust in more than 30 years. Existing paleogeodetic evidence of vertical deformation in past centuries is too sparse to characterize earlier major activity, but leaves open the possibility of historic great backthrust earthquakes. Our geodetic evidence for rupture of the Mentawai backthrust during the two recent earthquake clusters suggests that this large fault may well pose an additional seismic and tsunami hazard to the coastal communities of central Sumatra.
DOI: 10.1029/2011GL047226
Rights: © 2011 AGU. This paper was published in Geophysical Research Letters and is made available as an electronic reprint (preprint) with permission of American Geophysical Union. The paper can be found at DOI: []. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:EOS Journal Articles

Files in This Item:
File Description SizeFormat 
Another potential source of destructive earthquakes and tsunami offshore of Sumatra.pdf632.48 kBAdobe PDFThumbnail

Web of ScienceTM
Citations 20

Updated on Jan 26, 2023

Page view(s) 5

Updated on Feb 2, 2023

Download(s) 10

Updated on Feb 2, 2023

Google ScholarTM




Items in DR-NTU are protected by copyright, with all rights reserved, unless otherwise indicated.