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Recurring large deep earthquakes in Hindu Kush driven by a sinking slab

Zhan, Zhongwen and Kanamori, Hiroo (2016) Recurring large deep earthquakes in Hindu Kush driven by a sinking slab. Geophysical Research Letters, 43 (14). pp. 7433-7441. ISSN 0094-8276. doi:10.1002/2016GL069603.

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Hindu Kush subduction zone produces large intermediate-depth earthquakes within a small volume every 10–15 years. Here we study the last three M ≥ 7 events within the cluster and find complex and diverse rupture processes. However, their main subevents appear to recur on the same fault patch, dipping 70° to the south. This recurrence requires an average of 9.6 cm/yr slip rate on the patch, much higher than the ~1 cm/yr surface convergence rate measured geodetically. The high slip rate is likely caused by significant slab internal deformation, such as localized slab stretching/necking. We infer that the Hindu Kush subducted slab below 210 km is sinking through the mantle at a vertical rate of 10 cm/yr.

Item Type:Article
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URLURL TypeDescription
Zhan, Zhongwen0000-0002-5586-2607
Kanamori, Hiroo0000-0001-8219-9428
Additional Information:© 2016 American Geophysical Union. Received 17 MAY 2016; Accepted 29 JUN 2016; Accepted article online 4 JUL 2016; Published online 16 JUL 2016. Incorporated Research Institutions for Seismology (IRIS) provided the seismic data used in this study. We thank Thorne Lay and Lingling Ye for constructive discussions, and two anonymous reviewers for comments.
Group:Seismological Laboratory
Issue or Number:14
Record Number:CaltechAUTHORS:20160819-095904184
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Official Citation:Zhan, Z., and H. Kanamori (2016), Recurring large deep earthquakes in Hindu Kush driven by a sinking slab, Geophys. Res. Lett., 43, 7433–7441, doi:10.1002/2016GL069603
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:69782
Deposited By: Tony Diaz
Deposited On:22 Aug 2016 21:06
Last Modified:11 Nov 2021 04:19

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