A great earthquake doublet and seismic stress transfer cycle in the central Kuril islands

Charles J. Ammon, Hiroo Kanamori and Thorne Lay ()
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Charles J. Ammon: The Pennsylvania State University, 440 Deike Building, University Park, Pennsylvania 16802, USA
Hiroo Kanamori: Seismological Laboratory, California Institute of Technology, MS 252-21, Pasadena, California 91125, USA
Thorne Lay: University of California, Santa Cruz, California 95064, USA

Nature, 2008, vol. 451, issue 7178, 561-565

Abstract: Danger in numbers Two recent great earthquakes near the Kuril islands — the Pacific group often in the news because of a sovereignty dispute between Japan and Russia — dramatically demonstrate the process by which large subduction-zone earthquakes can influence the stresses and earthquake activity within the subducting oceanic plate itself. On 15 November 2006, a magnitude-8.3 event ruptured the shallow-dipping plate boundary where the Pacific plate descends beneath the central Kuril arc. Within minutes, intraplate extensional earthquakes occurred in the outer rise region seaward of the Kuril trench. Then on 13 January 2007, a magnitude-8.1 event ruptured a normal fault extending through the upper portion of the Pacific plate, producing one of the largest recorded shallow extensional earthquakes.

Date: 2008
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DOI: 10.1038/nature06521

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