新疆異地雙震預警結果分析及算法改進

打開文本圖片集

關鍵詞新疆雙震；地震預警；首臺震相；地震影響范圍；臺站觸發(fā)比例中圖分類號：P315.7 文獻標識碼：A 文章編號：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

國家地震烈度速報與預警工程項目（下文簡稱國家工程）已經(jīng)在全國范圍內正式對外提供服務[1]。（剩余9961字）