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地震预警连续定位方法研究
引用本文:金星,张红才,李军,韦永祥,马强.地震预警连续定位方法研究[J].地球物理学报,2012,55(3):925-936.
作者姓名:金星  张红才  李军  韦永祥  马强
作者单位:1. 福建省地震局,福州 350003; 2. 中国地震局工程力学研究所,哈尔滨 150008
基金项目:地震行业科研专项,国家科技支撑计划
摘    要:本文首先总结了地震预警系统中采用的一些实时定位方法,随后结合我国地震监测台网实际运行情况,提出了一套从单个台站触发开始逐渐过渡到利用前四台触发信息的完整地震预警连续定位方法.利用福建省地震监测台网记录的68个M3.0级以上地震观测记录,对本文方法的验证结果表明,对于网内地震,采用本文方法的单台定位结果误差均小于为50 km,双台定位结果误差均小于35 km,三台定位结果误差约为15 km,四台定位结果误差约为6 km;网外地震的三台、四台定位结果误差均小于30 km.推导了采用本文三、四台预警定位方法的误差公式.利用福建地区现有及"十一五"完成后的地震观测台网分别计算得到了定位误差分布图.根据误差分析结果即可对定位结果的可靠性预先做出判断,有利于提高地震预警系统运行的可靠性.

关 键 词:地震预警  连续定位  定位误差  
收稿时间:2011-07-29

Research on continuous location method used in earthquake early warning system
JIN Xing , ZHANG Hong-Cai , LI Jun , WEI Yong-Xiang , MA Qiang.Research on continuous location method used in earthquake early warning system[J].Chinese Journal of Geophysics,2012,55(3):925-936.
Authors:JIN Xing  ZHANG Hong-Cai  LI Jun  WEI Yong-Xiang  MA Qiang
Institution:1. Fujian Earthquake Administration, Fuzhou 350003,China; 2. Institute of Engineering Mechanics, China Earthquake Administration, Harbin 150008,China
Abstract:In this paper,the author first summarized real-time location methods applied in earthquake early warning system,then considering the actual situation of seismic monitoring network in our country,we proposed a complete set of location method that continuously locates an earthquake from only one triggered monitoring station to four stations.In order to test the method,we selected 68 earthquakes above magnitude 3.0 recorded by Fujian earthquake monitoring networks.The result shows that,for most in-net earthquakes,the single station method′s location error is all less than 50 km,the two-station′s location error is less than 35 km,the three-station′s location error is about 15 km,and four-station′s location error is about 6 km;for out-net earthquakes,the three or four-station method′s location error all less than 30 km.We deduced the location error estimation function for the method using first three,four station′s information.The distributions of location errors for the present seismic monitoring stations and the new monitoring stations after the "eleventh five-year plan" construction in Fujian region were drawn separately.Based on these analyses,we can make judgment of the location results in advance,and then the reliability of the whole earthquake early warning system can be improved.
Keywords:Earthquake early warning  Continuous earthquake location  Location error
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