首页|期刊导航|中国地震研究（英文版）|Research on Seismicity and Source Parameters of Small Earthquakes in the Zipingpu Reservoir before the Wenchuan Ms 8.0 Earthquake1
中国地震研究（英文版）2010，Vol.24Issue(3)：292-303,12.
Research on Seismicity and Source Parameters of Small Earthquakes in the Zipingpu Reservoir before the Wenchuan Ms 8.0 Earthquake1
Research on Seismicity and Source Parameters of Small Earthquakes in the Zipingpu Reservoir before the Wenchuan Ms 8.0 Earthquake1
摘要
Abstract
Based on the digital seismic waveform data observed from regional and reservoir seismic networks,the seismicity and source parameters in the Zipingpu reservoir area from January 1,2000 to May 11,2008 before the Wenchuan Ms8.0 earthquake are studied.The analysis shows a continuous activity of small earthquakes before the Wenchuan Ms8.0 earthquake.The level of seismic activity was from ML2.0 to ML3.0 in recent years.The impoundment of Zipingpu reservoir started in September 2005 and the obvious increment of seismic activities occurred in February 2008.but according to the analysis of the longer time series,the frequency and intensity of seismic activities do not exceed its range,which means it is still a fluctuation of regional seismic activities or tectonic activity.At the same time,we also studied the spatio-temporal distribution and the change of apparent stress difference in the source region before the great earthquake,and the results show that the apparent stress values of small earthquakes are generally higher than fitted values of apparent stress in the reservoir area in the nearly three months before the Wenchuan MS 8.0 earthquake.It can be seen from the spatial distribution of apparent stress difference,that the epicenter of the earthquake is located at a low stress distribution area,and the relatively high apparent stress difference is at the east of the epicenter.Apparent stress increment occurred in local areas.关键词
Reservoir-induced earthquake activity/Zipingpu reservoir/Source parameters/Apparent stressKey words
Reservoir-induced earthquake activity/Zipingpu reservoir/Source parameters/Apparent stress分类
天文与地球科学引用本文复制引用
Zhang Zhiwei,Cheng Wanzheng,Zhang Yongjiu,Xie Ronghua,Fu Ying..Research on Seismicity and Source Parameters of Small Earthquakes in the Zipingpu Reservoir before the Wenchuan Ms 8.0 Earthquake1[J].中国地震研究（英文版）,2010,24(3):292-303,12.基金项目
This project was sponsored by the research project on reservoir earthquake monitoring and prediction technique(2008BAC38B03-02),China. （2008BAC38B03-02）
