南中国海区域海啸预警中心地震监测系统  

The earthquake monitoring system in the South China Sea Tsunami Advisory Center

作　　者：徐志国[1] 史健宇 李宏伟[1] 王宗辰 Xu Zhiguo;Shi Jianyu;Li Hongwei;Wang Zongchen(National Marine Environmental Forecasting Center,Beijing 100081,China)

机构地区：[1]国家海洋环境预报中心,北京100081

出　　处：《地震科学进展》2022年第10期473-481,共9页Progress in Earthquake Sciences

基　　金：自然资源部“中印尼海洋与气候中心发展”项目(2029999001)资助。

摘　　要：简要介绍了南中国海区域海啸预警与减灾系统的建设和发展历程,同时重点阐述了地震监测系统构成及其基本功能。作为重要组成部分,地震监测系统通过地震数据的实时汇集、存储、自动处理和分析,并结合人机交互方式实现了地震定位、震源机制解和有限断层模型反演。实际应用表明,地震监测系统对全球6.0级以上地震定位时间不超过8 min,在震后10—15 min内完成W震相方法快速反演海底强震震源机制解,在震后短时间内完成有限断层模型反演,为海啸预警提供快速、准确、可靠的地震基本参数和震源特征参数。This paper briefly reviewed the initiation steps and developments of the South China Sea Region Tsunami Warning and Mitigation Systems. In addition,we highlighted the structure and basic functions of the earthquake monitoring and processing system of the Tsunami Warning Systems,such as earthquake location,source mechanism solution and finite fault model inversion using the real-time seismic waveform data from regional and global seismographic networks,that will result in the rapid source parameters estimation for a larger earthquake in tsunami warning. Numerous simulations and hands-on events have shown that the preliminary earthquake parameters could be determined in less than 8 minutes after earthquake. The W-phase method is able to produce rapid and reliable estimation of the moment magnitude and source mechanism for larger events within 10-15 minutes after the earthquake. A finite fault model can be acquired after the earthquake event via computing teleseismic body-wave inversion program. The earthquake monitoring and processing system provide accurate and reliable information in contributing to tsunami warning services.

关 键 词：南中国海区域 海啸预警 地震基本参数 震源机制解 有限断层模型 

分 类 号：P315.61[天文地球—地震学]