首页|期刊导航|中国地震研究(英文版)|Study of the Relation Between the Features of Fault Deformation Tendency Anomaly and Earthquake Activity in the West of China
中国地震研究(英文版)2000，Vol.14Issue(3)：265-276,12.
Study of the Relation Between the Features of Fault Deformation Tendency Anomaly and Earthquake Activity in the West of China
Study of the Relation Between the Features of Fault Deformation Tendency Anomaly and Earthquake Activity in the West of China
摘要
Abstract
Using the tendentious accumulation rate of crustal deformation, Dc, the spatial distributionfeatures of deformation across fault in the West of China was studied; the regional patterns ofdeformation accumulation induced by fault activity was established and its seismogenicmeaning was discussed. The types of fault deformation evolution in the time domain and thefeatures of change of large extent anomaly in fault deformation which occurred in 1995 ～ 1996was analyzed comprehensively. It was indicated definitely that 1995～ 1996 is the turningpoint of fault network activity in the West of China since the 1990s; it is closely related to thechange of main seismic active regions in the West of China, i.e., the alternation of strong/weak stages and the change of action range of tectonic stress field in the Qinghai-Tibet blockand its environs; and hence it is of medium- and short-term precursor meaning for the changeof the overall pattern of earthquake activity in the West of China in the year 1996. On such abasis, a preliminary investigation of the mechanical mechanism and block movementbackground was made. We hold that the formation of NE-trending band of Ms6.0earthquakes in 1988～1996 and NW-trending band of Ms5.0 earthquakes in 1997～1999 canprove in mechanics that the West of China is now in a state that the N-S stress weakensrelatively but E-W stress strengthens relatively and predominates.关键词
Fault deformation/Tendentious accumulation rate/Crowd anomaly/Turning pointKey words
Fault deformation/Tendentious accumulation rate/Crowd anomaly/Turning point分类
天文与地球科学引用本文复制引用
Chen Bing,Jiang Zaisen,Zhao Zhencai..Study of the Relation Between the Features of Fault Deformation Tendency Anomaly and Earthquake Activity in the West of China[J].中国地震研究(英文版),2000,14(3):265-276,12.基金项目
This research was sponsored by National Key Basic Research Project--"TheMechanism and Prediction of Strong Continental Earthquake"(G19980407). （G19980407）
