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Energy Release of the 2013 M_w 8.3 Sea of Okhotsk Earthquake and Deep Slab Stress Heterogeneity

Ye, Lingling and Lay, Thorne and Kanamori, Hiroo and Koper, Keith D. (2013) Energy Release of the 2013 M_w 8.3 Sea of Okhotsk Earthquake and Deep Slab Stress Heterogeneity. Science, 341 (6152). pp. 1380-1384. ISSN 0036-8075. doi:10.1126/science.1242032.

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Earth’s deepest earthquakes occur in subducting oceanic lithosphere, where temperatures are lower than in ambient mantle. On 24 May 2013, a magnitude 8.3 earthquake ruptured a 180-kilometer-long fault within the subducting Pacific plate about 609 kilometers below the Sea of Okhotsk. Global seismic P wave recordings indicate a radiated seismic energy of ~1.5 × 10^(17) joules. A rupture velocity of ~4.0 to 4.5 kilometers/second is determined by back-projection of short-period P waves, and the fault width is constrained to give static stress drop estimates (~12 to 15 megapascals) compatible with theoretical radiation efficiency for crack models. A nearby aftershock had a stress drop one to two orders of magnitude higher, indicating large stress heterogeneity in the deep slab, and plausibly within the rupture process of the great event.

Item Type:Article
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URLURL TypeDescription DOIArticle
Ye, Lingling0000-0002-8739-2072
Lay, Thorne0000-0003-2360-4213
Kanamori, Hiroo0000-0001-8219-9428
Additional Information:© 2013 American Association for the Advancement of Science. Received 17 June 2013; accepted 7 August 2013. We thank E. Brodsky for helpful discussions and three anonymous reviewers for their thoughtful comments. The Incorporated Research Institutions for Seismology (IRIS) data management center provided the seismic recordings. This work was supported in part by NSF under grant EAR-1245717 (T.L.). All data used are available from the IRIS data center at
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Issue or Number:6152
Record Number:CaltechAUTHORS:20131018-080307029
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:41981
Deposited By: Tony Diaz
Deposited On:18 Oct 2013 17:00
Last Modified:10 Nov 2021 04:36

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