运用尾波干涉技术监测瑞昌—阳新<i>M</i><sub>S</sub>4.6地震后地壳介质变化

运用尾波干涉技术监测瑞昌—阳新M_S4.6地震后地壳介质变化

摘要: 基于2011年瑞昌—阳新M_S4.6地震序列事件波形及其观测报告，采用双差重定位法、波形互相关法和尾波干涉法，筛选出了同时被黄梅台和九江台记录且波形互相关系数≥0.920的两组重复地震对：D₁（2011-09-11 05:44 M_L2.3和2011-10-24 08:06 M_L2.2）和D₂（2011-09-18 07:06 M_L2.8和2011-10-2408:06 M_L2.2），发现瑞昌—阳新M_S4.6地震后1.5个月内（2011-09-11—10-24）震源区S波早期尾波波速增加。

Abstract: Based on the event waveform data and its observation report of the 2011 Ruichang-Yangxin M_S4.6 earthquake sequence processed by the double-difference method, waveform cross-correlation and coda wave interferometry, two groups of repeating earthquakes (cc≥0.920, recorded by station Huangmei and station Jiujiang) can be obtained: D₁ (2011-09-11 05:44 M_L2.3 and 2011-10-24 08:06 M_L2.2) and D₂ (2011-09-18 07:06 M_L2.8 and 2011-10-24 08:06 M_L2.2). It could be found that the velocity of early S wave coda increased within 1.5 months (2011-09-11—10-24) in source region after the M_S4.6 Ruichang-Yangxin earthquake.