昌平地震台震时钻孔应变资料可靠性分析

Reliability Analysis of Co-seismic Borehole Strain Data at Changping Seismological Station

通过利用实测钻孔应变资料的震时信息验证其可靠性是用钻孔应变资料进行地震分析预报必不可少的一项工作。本文对2003年9月26日日本8．0级地震昌平地震台的三种钻孔应变仪实测应变资料从各仪器的受力状况、应变阶跃等方面进行初步分析研究,以验证钻孔应变资料的可靠性。

When an earthquake occurs,the stress field around a borehole changes,and a large a-mount of co-seismic information can be recorded.Utilizing co-seismic observations to verify the reliability of borehole strain data is a necessary work for the data to be used in earthquake prediction.This paper makes a preliminary analysis of the strain data recorded by three borehole strainmeters at Changping station for the 2003/9/26 Japan earthquake(MS8)in terms of stress state and strain steps,thereby verifing the reliability of borehole strain data.