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Title:: Relevant Analysis for Phase of Qinghai Menyuan M_S6.4 Earthquake in 2016 Recorded by Golmud Seismic Station

作者:: 李延京¹; 刘城¹; 2; 杨广华²; 1.青海省地震局乐都地震台,青海乐都 810700; 2.青海省地震局格尔木地震台,青海格尔木 816000

Author(s):: LIU Yanjing¹; LIU Cheng¹; 2; YANG Guanghua²; 1. Ledu Seismic Station,Earthquake Administration of Qinghai Province,Ledu 810700,Qinghai,China2. Golmud Seismic Station,Earthquake Administration of Qinghai Province,Golmud 816000,Qinghai,China

Keywords:: Menyuan M_S6.4 earthquake; diurnal variation of geomagnetic vertical component; load-unloading response ratio; daily variation amplitude radio

摘要:: 采用格尔木地震台所记录的地震波形数据对门源M_S6.4地震震相进行分析。结果显示:此次地震的震相符合一般近震特征,在对地震波形数据处理过程中,震相有Pn、Pg、Sn、Sg,运用单台定位处理方法估测出地震的震源深度为10 km,与Hypoast定位方法测定结果近似一致,利用初至波估算出格尔木地震台震中距约为756 km。

Abstract:: Based on the seismic waveforms of the Menyuan M_S6.4 earthquake recorded by Golmud Seismic Station,we analyzed its phase by using phase analytical software.The results show that the phase characteristics of Menyuan M_S6.4 earthquake accord with that of the general near earthquake,which shows Pn、Pg、Sn、Sg phases in the process of seismic waveforms processing. The focal depth is 10 km measured by single station location processing method,which is consistent with the results by Hypoast location method. The epicenter distance of Golmud Seismic Station is 617 km by using of seismic first arrival wave.