2022年1月8日青海门源M_(S)6.9地震余震序列自动处理结果探讨  

Discussion on the automatic processing results for the aftershock sequence of Menyuan,Qinghai M_(S)6.9 earthquake on 8 January,2022

作　　者：王祖东 杨晓鹏 尹欣欣 蒲举 王维欢 陈晓龙 WANG Zudong;YANG Xiaopeng;YIN Xinxin;PU Ju;WANG Weihuan;CHEN Xiaolong(Gansu Earthquake Agency, Lanzhou 730000, Gansu, China)

机构地区：[1]甘肃省地震局,甘肃兰州730000

出　　处：《地震工程学报》2022年第2期408-414,共7页China Earthquake Engineering Journal

基　　金：中国地震局地震预测研究所基本科研业务专项(2020IESLZ01);甘肃省科技计划(21YF5FA031);甘肃省科技计划(21JR7RA797)。

摘　　要：使用2022年1月8日青海门源M_(S)6.9地震前3天及后7天甘肃地震台网固定台站和邻省共享台站记录到的连续波形数据,利用自动编目程序自动检测余震序列,并将检测结果与人工编目结果进行对比分析。结果表明:自动编目与人工编目定位结果基本一致,平均震中位置差在5 km以内,震级差值在M_(L)-0.2~M_(L)0.2间;自动编目结果的发震时刻普遍略早于人工目录,但两种目录中大部分余震发生时刻的差值在2 s内。自动编目产出速度快,且能检测人工无法识别的微小余震,提高了目录完备性。综合来看,自动编目系统产出结果符合预期目标,可为震群趋势判断、破裂过程快速反演等相关科学研究提供数据支撑。The continuous waveform data three days before and seven days after the M_(S)6.9 earthquake in Menyuan,Qinghai Province on January 8,2022 were recorded by the permanent stations of Gansu seismic network and the shared stations of neighboring provinces.In this paper,the aftershock sequence was detected by the automatic cataloging program based on the data,and the results were compared with the manual cataloging results.It was found that the results of automatic catalogue and manual catalogue are basically the same;the average epicenter position difference is within 5 km,and the magnitude difference is between M_(L)-0.2~M_(L)0.2.The earthquake occurrence time from automatic catalogue results is slightly earlier than that from manual catalogue,but the difference of the occurrence time of most aftershocks in the two catalogs is within 2 s.The output speed of automatic cataloging is fast,so it could detect small aftershocks that cannot be recognized manually,thus improving the completeness of the catalogue.On the whole,the output results of the automatic cataloging system can meet the expected objectives,and can provide data support for relevant scientific research,such as earthquake swarm trend judgment and rapid inversion of rupture process.

关 键 词：门源地震 自动编目 震相检测 深度学习 

分 类 号：P315[天文地球—地震学]