辽宁地区5级地震前加速矩释放现象的“回溯性”研究

Studying on Accelerating Moment Release(AMR)Before M_S≥5.0 Eathquake in Liaoning Region

强震前加速矩释放现象目前是国际上讨论比较激烈的一个话题,而不同地区的强震前的加速矩释放现象应各有不同。通过对辽宁地区1999年以来的3次MS5.0地震震前加速矩释放现象进行对比分析,并讨论了不同计算尺度和积累时间下震中附近地区m值的变化范围。认为在辽宁地区中强震前确实存在加速矩释放现象,且省内中强震发生前加速矩释放均存在累积半径较小和时间窗长较短的情况。

Accelerating Moment Release （ AMR ） before strong earthquakes is a topic of intense discussion in the world at present, and the accelerating moment release before strong earthquakes in different regions should be different. This paper makes a comparative analysis of the accelerating moment release before the three Ms ≥ 5.0 earthquakes in Liaoning area since 1999, and discusses the variation range of m value in the area near the epicenter with different scales and accumulation time. We consider that before moderate-strong earthquakes in Liaoning it exists accelerating moment release, and before the moderate-strong earthquake occurrence, accelerating moment release are cumulative smaller radius and time window length is short.