摘要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.
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.
基金资助: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)
通讯作者:
Jieyuan Ning
E-mail: njy@pku.edu.cn
引用本文:
Xiaoting Lou, Chen Cai, Chunquan Yu, Jieyuan Ning. Intermediate-depth earthquakes beneath the Pamir-Hindu Kush Region: Evidence for collision between two opposite subduction zones[J]. 《地震学报》英文版, 2009, 22(6): 659-665.
Xiaoting Lou, Chen Cai, Chunquan Yu, Jieyuan Ning. Intermediate-depth earthquakes beneath the Pamir-Hindu Kush Region: Evidence for collision between two opposite subduction zones. Earthquake Science, 2009, 22(6): 659-665.