地震工程学报2017，Vol.39Issue(4)：790-796,7.DOI:10.3969/j.issn.1000-0844.2017.04.0790
现代地震预警系统中的时间延迟效应分析
Analysis of the Time Delay Effect in Modern Earthquake Early Warning Systems
摘要
Abstract
The problem of time delay in earthquake early warning (EEW) systems restricts their effectiveness.Shortening the delay time can significantly improve the efficiency and emergency response ability of EEWs.In this study, we analyze the delay factors, decompose the period from earthquake occurrence to the warning information release to many links, then calculate the specific delay time in each link.We then compare the warning level and radius of warning blind area in autochthonous, allochthonous, and mixed EEW models, and analyze each model's delaying effect.The results show that the time delay in EEWs mainly comprises delay in data transition and processing;with a minimum theoretical delay time of Δt=3.9 s, an average delay time of Δt=14.3 s in the mainstream EEW, and Δt=8.7 s in the most advanced EEW.Moreover, the time delay exerts influence on the radius of the blind area in a shallow earthquake and a positive relationship can be witnessed.For example, when Δt=8.7 s, the blind area radius is 52.2 km and when Δt=3.9 s, the largest blind area radius is only 23.4 km.The results indicate that effective shortening of delay time can not only improve the timeliness of earthquake early warnings, but also reduce the blind area.关键词
预警系统/时间延迟/时效性/预警盲区Key words
early warning system/time delay/timeliness/early warning blind area分类
天文与地球科学引用本文复制引用
李拴虎,陈立峰,姚远,韩晓明,杨红樱..现代地震预警系统中的时间延迟效应分析[J].地震工程学报,2017,39(4):790-796,7.基金项目
2016年内蒙古自治区科技厅重大专项(强震短临跟踪和空地立体观测技术集成创新) （强震短临跟踪和空地立体观测技术集成创新）
中国地震局监测、预测、科研三结合课题(160506) （160506）
