美国ShakeAlert地震预警系统2.0版本的发展

Development of ShakeAlert 2.0 earthquake early warning system in the United States

美国西海岸地区ShakeAlert地震预警系统能够在破坏性地震波到达前发布地震警报,从而减轻地震造成的灾害.经过近十余年的发展,ShakeAlert系统研发已基本完成,2019年10月17日,ShakeAlert 2.0系统开始在加利福尼亚全州进行测试,正式向全州公众发布地震预警信息.本文回顾了ShakeAlert 2.0地震预警系统的发展历程,详细介绍了台站观测系统、数据传输系统、数据处理与警报中心、测试与认证平台、信息发布系统和终端用户显示等情况,旨在分析ShakeAlert 2.0系统在防震减灾方面的巨大效用以及对中国地震预警系统发展的借鉴.

ShakeAlert earthquake early warning system in the west coast of the United States can issue alerts to the public before destructive seismic waves arrive,mitigating the hazards of earthquakes.After more than ten years of development,the research of ShakeAlert has been basically completed.On October 17,2019,California began testing the ShakeAlert system version 2.0,and officially released earthquake early warning information to the state.This paper reviews the development of ShakeAlert,and introduces sensor networks,field telemetry,central processing architecture,testing and certification platform,alert distribution and end-user display in detail.The purpose is to analyze the great utility of the ShakeAlert 2.0 system in earthquake prevention and disaster mitigation and its reference to the development of Chinese earthquake early warning system.