P_d-τ_c相容性检验方法在触发事件判别分析中的应用  

Application of P_d-τ_c compatibility criterion to distinguishing triggered events

作　　者：张红才[1] 金星[1,2] 李军[1] 陈智勇[1] 

机构地区：[1]福建省地震局,中国福州350003 [2]中国地震局工程力学研究所,中国哈尔滨150008

出　　处：《地震学报》2017年第1期102-110,共9页Acta Seismologica Sinica

基　　金：地震科技星火计划(XH16020Y);国家科技支撑计划(2014BAK03B02)资助

摘　　要：结合福建地区地震预警系统的运行情况和处理能力,利用日本KiK-net台网和福建地震台网记录的天然地震事件和人工爆破事件实测数据,探讨了P_d-τ_c相容性检验方法在触发事件类型实时判别中应用的可行性.结果表明,P_d-τ_c相容性检验方法能够较好地区分大震级地方震与误触发事件,也能对远震事件进行粗略判别,但对于小震级地方震和人工爆破事件则无法有效判别.随后,以P_d-τ_c相容性检验结果为基础,本文设定强度参数Pd=10^(-3) cm为界线,即可从众多触发事件中甄选出可能产生破坏的大震级地方震事件.本文方法有助于提高触发事件类型判别结果的可靠性、预警系统的处理效率和系统产出信息的准确度.Combining the operation status of the earthquake early warning （EEW） system in Fujian Province, this paper discusses the feasibility of the Pd-τc compatibility criterion in discrimination of triggered events, based on seismic records of KiK-net in Japan and seismic monitoring networks of Fujian Province, in which both spontaneous earthquakes and artificial explosion events are included. The results show that, for large local earthquakes and false triggering events, Pd-τc criterion is quite reliable with less error. Also, teleseismic earthquake events may be roughly judged by the criterion. But artificial explosions and/or small magnitude local earthquakes cannot be effectively distinguished only by this criterion. Furthermore, based on the Pd-τc compatibility test results, this paper sets an intensity test standard by the parameter Pd = 10^-3 cm, by which those destructive earthquakes can be identified more accurately. The present method will help to improve the reliability of triggered events discrimination, promote processing efficiency of the whole EEW system, eventually generate more accurate seismic alert message.

关 键 词：地震预警 Pd-τc相容性 触发事件判别 

分 类 号：P315.01[天文地球—地震学]