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ISSN 2096-7780 CN 10-1665/P

晏绮云, 汪建, 沈平, 徐翔, 刘冀长, 胡澜, 佘旭明. 湖南地区重复地震识别及其在数字地震台网定位评价中的应用[J]. 地震科学进展 . DOI: 10.19987/j.dzkxjz.2024-051
引用本文: 晏绮云, 汪建, 沈平, 徐翔, 刘冀长, 胡澜, 佘旭明. 湖南地区重复地震识别及其在数字地震台网定位评价中的应用[J]. 地震科学进展 . DOI: 10.19987/j.dzkxjz.2024-051
Yan Qiyun, Wang Jian, Shen Ping, Xu Xiang, Liu Jichang, Hu Lan, She Xuming. Recognition of repeating earthquakes in Hunan area and its application to seismic network location evaluation[J]. Progress in Earthquake Sciences. DOI: 10.19987/j.dzkxjz.2024-051
Citation: Yan Qiyun, Wang Jian, Shen Ping, Xu Xiang, Liu Jichang, Hu Lan, She Xuming. Recognition of repeating earthquakes in Hunan area and its application to seismic network location evaluation[J]. Progress in Earthquake Sciences. DOI: 10.19987/j.dzkxjz.2024-051

湖南地区重复地震识别及其在数字地震台网定位评价中的应用

Recognition of repeating earthquakes in Hunan area and its application to seismic network location evaluation

  • 摘要: 本文基于湖南地震台网在2009—2022年间记录的778个地震事件波形及其观测报告,开展波形互相关分析,设定重复地震筛选条件为:同时被至少3个台站记录,且互相关系数不低于0.8。共识别出重复地震对149组,占地震总数的14.5%。通过这些重复地震对,对湖南地震台网的定位水平和震相拾取精度进行评估,结果表明:湖南地震台网的水平定位误差约为3.5 km,垂直定位误差约为3 km;Pg和Sg震相的拾取误差分别约为0.4 s和0.7 s。此外,湖南地区定位误差没有明显的区域差别,除常德地区外,误差值基本在4 km内。

     

    Abstract: Based on the 778 earthquakes (2009-2022) and its observation reports recorded in the Hunan Seismic Network, through the analysis of the cross-correlation of the waveforms, 149 repeated earthquake pairs were obtained by that the pairs are recorded at least 3 stations and the cross-correlation coefficient no less than 0.8. After obtaining these data, the location error and phase picking error of the Hunan Seismic Network were statistically analyzed. The results show that the horizontal location error is around 3.5 km, and the vertical location error is around 3 km. The Pg and Sg phase picking errors are about 0.4 s and 0.7 s, respectively. There is no significant difference in location error in Hunan region, except for Changde area, where the error value is basically within 4 km.

     

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