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On the recurrence of great subduction zone earthquakes

Rajendran, Kusala (2013) On the recurrence of great subduction zone earthquakes. In: Current Science, 104 (7). pp. 880-892.

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Official URL: http://www.currentscience.ac.in/php/toc.php?vol=10...


The last decade has witnessed two unusually large tsunamigenic earthquakes. The devastation from the 2004 Sumatra Andaman and the 2011 Tohoku-Oki earthquakes (both of moment magnitude >= 9.0) and their ensuing tsunamis comes as a harsh reminder on the need to assess and mitigate coastal hazards due to earthquakes and tsunamis worldwide. Along any given subduction zone, megathrust tsunamigenic earthquakes occur over intervals considerably longer than their documented histories and thus, 2004-type events may appear totally `out of the blue'. In order to understand and assess the risk from tsunamis, we need to know their long-term frequency and magnitude, going beyond documented history, to recent geological records. The ability to do this depends on our knowledge of the processes that govern subduction zones, their responses to interseismic and coseismic deformation, and on our expertise to identify and relate tsunami deposits to earthquake sources. In this article, we review the current state of understanding on the recurrence of great thrust earthquakes along global subduction zones.

Item Type: Journal Article
Publication: Current Science
Publisher: Indian Academy of Sciences
Additional Information: Copyright of this article belongs to Indian Academy of Sciences.
Keywords: Andaman-Nicobar; earthquake recurrence; subduction zone; tsunami geology
Department/Centre: Division of Mechanical Sciences > Centre for Earth Sciences
Date Deposited: 11 Jun 2013 07:34
Last Modified: 11 Jun 2013 07:34
URI: http://eprints.iisc.ac.in/id/eprint/46648

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