利用远震深度震相pP测定玛多M_(s)7.4地震震源深度  

DETERMINATION OF FOCAL DEPTH OF MADUO M_(s)7.4 EARTHQUAKE BY TELESEISMIC DEPTH PHASE pP

作　　者：郑雪刚[1] 马学军[1] 沙木哈尔·叶尔肯 赵鹏毕 ZHENG Xue-gang;MA Xue-jun;Shamuhaer Yeerken;ZHAO Peng-bi(Xinyuan Seismic Station of Earthquake Agency of Xinjiang Uygur Autonomous Region,Xinyuan 835800,Xinjiang,China)

机构地区：[1]新疆维吾尔自治区地震局新源地震监测中心站,新疆新源835800

出　　处：《内陆地震》2024年第4期307-314,共8页Inland Earthquake

基　　金：中国地震局三结合课题(3JH-2021055);新疆地震科学基金(202011)。

摘　　要：对于中强地震震源深度的测定,远震转换波深度震相pP、sP测深是有效方法,在深度震相清晰时深度精度可以达到2 km。使用Teleseis程序拟合玛多M_(s)7.4地震的理论地震图,并与实际观测进行对比,对此次地震震源深度进行测定,分析探讨地壳速度模型对远震体波深度震相pP测深的影响。结果表明,玛多地震的震源初始破深度为12 km,速度模型中Vp的不确定性对理论地震图中震相到时影响更大。For the determination of the focal depth of moderately strong earthquakes,the teleseismic converted wave depth phase pP and sP sounding is an effective method,and the depth accuracy can reach 2 km when the depth phase is clear.Teleseis program is used to fit the theoretical seismogram of the Maduo M_(s)7.4 earthquake,and compared with the actual observation.The focal depth of the earthquake is measured,and the influence of the crustal velocity model on the teleseismic body wave depth phase pP sounding is analyzed and discussed.The results show that the initial rupture depth of the Maduo earthquake is 12 km,and the uncertainty of the V,in the velocity model has a greater in-fluence on the arrival time of the seismic phase in the theoretical seismogram.

关 键 词：震源深度 玛多地震 pP震相 

分 类 号：P315.7[天文地球—地震学]