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The 23 June 2014 Mw 7.9 Rat Islands archipelago, Alaska, intermediate depth earthquake

Ye, Lingling and Lay, Thorne and Kanamori, Hiroo (2014) The 23 June 2014 Mw 7.9 Rat Islands archipelago, Alaska, intermediate depth earthquake. Geophysical Research Letters, 41 (18). pp. 6389-6395. ISSN 0094-8276. http://resolver.caltech.edu/CaltechAUTHORS:20141027-100738868

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Use this Persistent URL to link to this item: http://resolver.caltech.edu/CaltechAUTHORS:20141027-100738868

Abstract

On 23 June 2014, the largest intermediate depth earthquake (M_w 7.9) of the last 100 years ruptured within the subducting Pacific plate about 100 km below the Rat Islands archipelago of the Western Aleutian Islands, Alaska. The unusual faulting orientation, strike = 206°, dip = 24°, and rake = −14°, is possibly related to curvature of the underthrust slab and high obliquity of the relative plate motions. The first ~15 s of the rupture generated relatively weak seismic waves, followed by strong energy release for the next 25 s. The seismic moment is 1.0 × 10^(21) Nm, and slip of up to ~10 m is concentrated within a 50 km × 50 km region. The radiated energy is 1.1 to 2.7 × 10^(16) J, assuming attenuation t* of 0.4 to 0.7 s. This type of intraplate faulting can be very damaging for populated regions above subduction zones such as Japan, Taiwan, Chile, and Indonesia.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://onlinelibrary.wiley.com/doi/10.1002/2014GL061153/abstractPublisherArticle
http://dx.doi.org/10.1002/2014GL061153DOIArticle
http://onlinelibrary.wiley.com/doi/10.1002/2014GL061153/suppinfoPublisherSupporting Information
ORCID:
AuthorORCID
Ye, Lingling0000-0002-8739-2072
Lay, Thorne0000-0003-2360-4213
Kanamori, Hiroo0000-0001-8219-9428
Additional Information:© 2014 American Geophysical Union. Received 7 Jul 2014. Accepted 6 Sep 2014. Accepted article online 11 Sep 2014. Published online 26 Sep 2014. The IRIS DMS (http://www.iris.edu/hq/) and Orpheus (http://www.orfeus-eu.org) data centers were used to access the seismic data from Global Seismic Network and Federation of Digital Seismic Network stations, and the Hi-net data center (http://www.hinet.bosai.go. jp/about_data/?LANG=en) of NIED was used to access Hi-net recordings. This work made use of GMT and SAC software. K. Koper provided access to and training with his back projection software. We thank two anonymous reviewers for their helpful comments. This work was supported by NSF grant EAR1245717 (T.L.). The Editor thanks two anonymous reviewers for their assistance in reviewing this paper.
Funders:
Funding AgencyGrant Number
NSFEAR-1245717
Subject Keywords:Rat Islands earthquake; intermediate depth; Mw 7.9; intraslab deformation; rupture process; finite-fault model
Record Number:CaltechAUTHORS:20141027-100738868
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20141027-100738868
Official Citation:Ye, L., T. Lay, and H. Kanamori (2014), The 23 June 2014 Mw 7.9 Rat Islands archipelago, Alaska, intermediate depth earthquake, Geophys. Res. Lett., 41, 6389–6395, doi:10.1002/2014GL061153
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:50837
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:27 Oct 2014 17:35
Last Modified:06 Oct 2017 23:13

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