山西地震台网地震预警时间及盲区半径分析

摘要

影响地震预警能力的关键技术指标是预警时间及预警盲区.通过分析山西地震台网勘选完成的1 101个预警台站布局,计算地震台站平均台间距,根据预警盲区半径与台间距关系式得出盲区半径.根据计算结果及相关分布图,分析认为,在预警区内,平均台间距及盲区半径分布与地震活动的相关性较高,勘选完成的地震预警台站布局比较合理.%This paper discussed the key technical indicators of the earthquake early warning capacity:warning times and the blind zone.Based on the distribution of 1 101 warning stations which have been surveyed,we calculated the average interstation distance.According to the relationship between blind-zone radius and interstation distance,we calculated the blind-zone radius.Overall,on the basis of the calculation results and correlated distribution maps,both of average interstation distance and blind-zone radius have high correlation with seismic activity in the early warning zone,so the distribution of 1 101 warning stations of Shanxi seismic network is reasonable.