新疆异地双震预警结果分析及算法改进

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关键词新疆双震；地震预警；首台震相；地震影响范围；台站触发比例中图分类号：P315.7 文献标识码：A 文章编号：2096-7780（2025）05-0259-08doi： 10.19987/j.dzkxjz.2024-049

AbstractThe calculation of early warming for earthquakes remains an unresolved challnge worldwide.Doublet earthquakesare complex，anddiferent events canvarysignificantly.In April 2O23，doublet earthquakesoccurredat various locations in Xinyuan County，Xinjiang Province.TheFujian earthquake early warning system responded quickly and released three early warning reports. The first report was issued 27.4s after the first station was triggered， using data from six stations. Compared to the official earthquake catalog，the epicenter deviation was 131.54km and the magnitude deviation was 3.4.Byanalyzingthetimesequenceand spatial distributionof triggeredstations，we found that different earthquakes mayhavebeen incorrectly associated with the same event. Errors in determining thefirst triggered station led to significant deviations in the calculated location and magnitude.The processng algorithm for doublet earthquakes within the early waring system must be improved.The range of earthquake influence can be estimated using peak accelerationattenuation，and thereliabilityofthe firststationcanbeevaluated byanalyzing thetriggering ratioof surounding stations.These measures can help improve theof-site doublet earthquake processing algorithm in the Fujian early warning system.

Keywordsdoublet earthquakes in Xinjiang;earthquake early warning；seismic phase for the first station; earthquake affect range; triggering ratio of stations

0 引言

国家地震烈度速报与预警工程项目（下文简称国家工程）已经在全国范围内正式对外提供服务[1]。（剩余9961字）