辽宁地区5级地震前加速矩释放现象的“回溯性”研究
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摘要
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 M_S≥ 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.
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 M_S≥ 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.
引文
[1]蒋长胜,吴忠良.强震前的“加速矩释放”(AMR)现象:对一个有争议的地震前兆的回溯性震例研究.地球物理学报,2009,52(3):691-702.
[2]蒋长胜,吴忠良.2010年玉树MS7.1地震前的中长期加速矩释放(AMR)问题.地球物理学报,2011,54(6):1501-1510.
[3]李宇彤,蒋长胜.东北第五活跃期中强震前的矩释放空间扫描特征研究.地震学报,2010,32(6):680-695.
[4]李霞,蒋长胜,闫德桥,等.1989年以来华北地区中强震前地震矩加速释放空间扫描特征的研究.地震研究,2015,38(3):359-367.
[5]王亮,周龙泉,焦明若,等.海城盖州地区速度结构和震源位置的联合反演研究.地震,2014,34(3):13-26.
[6]黄显良,刘泽民,郁建芳,等.2014年安徽金寨ML3.9震群序列震源一致性研究.地震学报,37(6):916-924.
[7]Varnes D J,Bufe C G.The cyclic and fractal seismic series preceding an Mb 4.8 earthquake on 1980 February14 near the Virgin Islands.Geophys.J.Int.1996,124:149-158.
[8]王岩,邵媛媛,曹凤娟,等.基于因子分析的地震综合指数在辽宁地区地震预测中的应用.防灾减灾学报,2016,32(1):1-7.
[9]王亮,李彤霞,王岩,等.辽宁地区地震目录最小完整性震级研究.防灾减灾学报,2015,31(4):20-24.
[2]蒋长胜,吴忠良.2010年玉树MS7.1地震前的中长期加速矩释放(AMR)问题.地球物理学报,2011,54(6):1501-1510.
[3]李宇彤,蒋长胜.东北第五活跃期中强震前的矩释放空间扫描特征研究.地震学报,2010,32(6):680-695.
[4]李霞,蒋长胜,闫德桥,等.1989年以来华北地区中强震前地震矩加速释放空间扫描特征的研究.地震研究,2015,38(3):359-367.
[5]王亮,周龙泉,焦明若,等.海城盖州地区速度结构和震源位置的联合反演研究.地震,2014,34(3):13-26.
[6]黄显良,刘泽民,郁建芳,等.2014年安徽金寨ML3.9震群序列震源一致性研究.地震学报,37(6):916-924.
[7]Varnes D J,Bufe C G.The cyclic and fractal seismic series preceding an Mb 4.8 earthquake on 1980 February14 near the Virgin Islands.Geophys.J.Int.1996,124:149-158.
[8]王岩,邵媛媛,曹凤娟,等.基于因子分析的地震综合指数在辽宁地区地震预测中的应用.防灾减灾学报,2016,32(1):1-7.
[9]王亮,李彤霞,王岩,等.辽宁地区地震目录最小完整性震级研究.防灾减灾学报,2015,31(4):20-24.