Full-Text Search:
Home|Journal Papers|About CNKI|User Service|FAQ|Contact Us|中文
《Chinese Journal of Geophysics》 2007-03
Add to Favorite Get Latest Update

Velocity and attenuation structures in the focal area of 2003 Dayao earthquakes

WANG Wei-Jun~1, CHEN Ling~2, CHEN Qi-Fu~1, LIU Jie~31 Institute of Earthquake Science, China Earthquake Administration, Beijing 100036,China2 Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029,China3 China Earthquake Network Center, China Earthquake Administration, Beijing 100036, China  
By inversion of travel time and waveform data recorded by a temporary seismic network installed after the 21 July 2003 M6.2 and the 20 October 2003 M6.1 Dayao earthquakes in Yunnan province, three-dimensional (3-D) V_p, V_s and Q_p structures of the focal area were obtained. The 3-D imaging results show obvious low-V_p and low-Q_p anomalies, which corroborates the previous speculation from aftershock distribution that a NWW right lateral fault exists in the focal area. Besides that fault, there probably also exists a NNE fault which dips westward and exhibits low-V_p, low-V_s and low-Q_p features down to the depth of 8~10 km. According to these observations, we infer that in the Dayao focal area there are likely two faults intersecting with each other, similar to the intersecting faults ubiquitously observed in the whole North-South zone. We also suggest that the NNE fault may extend further to both north and south.
【Fund】: 国家自然科学基金项目(40504007)资助
【CateGory Index】: P315
Download(CAJ format) Download(PDF format)
CAJViewer7.0 supports all the CNKI file formats; AdobeReader only supports the PDF format.
©2006 Tsinghua Tongfang Knowledge Network Technology Co., Ltd.(Beijing)(TTKN) All rights reserved