sPL震相在巴东M4.3地震序列震源深度测定中的应用  

Application of sPL Phase in Focal Depth Determination of the Badong M4.3 Earthquake Sequence

作　　者：董彦君[1,2] 王秋良 申学林[1,2] 魏贵春 DONG Yanjun1,2 WANG Qiuliang1,2 SHEN Xuelin1,2 WEI Guichun1,2(1 Hubei Key Laboratory of Earthquake Early Warning, Institute of Seismology, CEA, 40 Hongshance Road, Wuhan 430071, China 2 Hubei Earthquake Agency, 48 Hongshance Road, Wuhan 430071, Chin)

机构地区：[1]中国地震局地震研究所(地震预警湖北省重点实验室),武汉市洪山侧路40号430071 [2]湖北省地震局,武汉市洪山侧路48号430071

出　　处：《大地测量与地球动力学》2018年第3期221-224,232,共5页Journal of Geodesy and Geodynamics

基　　金：国家自然科学基金(41572354);中国地震局测震台网青年骨干培养专项(20170613);中国地震局地震研究所所长基金(IS201726166)~~

摘　　要：根据近震深度震相sPL的基本特征,对2017-06-16巴东M4.3地震序列震源深度进行分析,运用频率-波数(F-K)方法模拟不同深度下的理论地震图,并与实际波形拟合对比,得出震源深度分布。结果显示,该地震序列的震源深度集中在3~4km范围内,误差约为1km,表明在三峡地区利用sPL震相可以获得较为可靠的震源深度。Based on the characteristics of depth phase sPL, aftershock data of the Badong M4.3 earthquake sequence on June 16th, 2017 are selected to constrain its focal depth. Comparing the synthetic seismograms at different depths obtained by the F-K method with the actual waveform, the focal depth distributions are acquired. The results show that the earthquake sequence is dominantly in the depth range of ca. 3-4 km and the error is about 1 km, indicating that reliable focal depth can be achieved by depth phase sPL in the Three Gorges reservoir area.

关 键 词：sPL震相 震源深度 F-K方法 巴东M4.3地震序列 

分 类 号：P315[天文地球—地震学]