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| Intermediate-depth earthquakes beneath the Pamir-Hindu Kush Region: Evidence for collision between two opposite subduction zones |
| Xiaoting Lou, Chen Cai, Chunquan Yu, Jieyuan Ning |
| Department of Geophysics, School of Earth and Space Sciences, Peking University, Beijing 100871, China |
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Abstract We employed a double-difference algorithm (hypoDD) to relocate earthquakes within the region bounded by 66°E-78°E and 32°N-42°N in the period of 1964-2003 reported by the International Seismological Center (ISC). The improved hypocentral locations delineate a double-layered Wadati-Benioff zone in the eastern Hindu Kush intermediate seismic belt. Based on this feature and other evidences, we propose that the intermediate-depth earthquakes beneath the Pamir-Hindu Kush region may occur in two collided subduction zones with opposite dip directions.
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Received: 31 August 2009
Published: 10 December 2009
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| Fund:the National Fundamental Science Program of China under (No. 2004cb418406), the National Natural Science Foundation of China (No.90814002) and Key Projects in the National Science & Technology Pillar Program during the Eleventh Five-year Plan Period (No. 2008BAC38B02-4) |
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Corresponding Authors:
Jieyuan Ning
E-mail: njy@pku.edu.cn
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