利用首都圈小震资料求解唐山震区震源机制解
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摘要
研究地震发生的重点是研究震源的问题,测定小震震源参数是研究震源及区域性构造应力状态的一项基础工作。本文利用首都圈范围内(39.5°～41.5°N,117.5°～119°E)20个地震台记录的数字波形资料,采用振幅比的方法(Pg初动方向、Pg的到时、Pg与Sg的最大振幅等资料),计算了唐山地区2003年1月至12月ML≥1.5的小震震源机制解,并对所得结果进行了初步讨论。
To study the occurrence of the earthquake focus is to study the focus and mesuring the small earthquake source parameters is a basic job for studying the source and regional tectonic stress state.The authors used the digital wave data of the Chinese capital area (39.5°～41.5°N,117.5°～119°E) recorded by 20 seismic stations, with the amplitude ratio method (first motion direction of Pg, arrival time of Pg, the maximum amplitude of Pg and Sg, etc.), worked out the fault plane solution to the small earthquakes ML≥1.5 between January and December 2003 in Tangshan, and preliminarily analyzed the results.
To study the occurrence of the earthquake focus is to study the focus and mesuring the small earthquake source parameters is a basic job for studying the source and regional tectonic stress state.The authors used the digital wave data of the Chinese capital area (39.5°～41.5°N,117.5°～119°E) recorded by 20 seismic stations, with the amplitude ratio method (first motion direction of Pg, arrival time of Pg, the maximum amplitude of Pg and Sg, etc.), worked out the fault plane solution to the small earthquakes ML≥1.5 between January and December 2003 in Tangshan, and preliminarily analyzed the results.
引文
[1]刁桂苓,于利民.唐山和澜沧地震序列震源区应力场的对比分析,地震学报,1995,17(3):305-311.
[2]梁尚鸿、李幼铭等,利用区域地震台网振幅比资料测定小震震源参数,地震学报,地震出版社,1984,27,3.
[3]高文学,马瑾.首都圈地震地质环境与地震灾害[M].地震出版社,1993.
[4]孟晓春.地震观测与分析技术(分析技术分册)[M].地震出版社,1998.
[5]魏勃林.震源机制变化的机理—转换应力场[M].地震出版社,1994.
[6][美]Bruce A.Bolt.地震九讲[M].地震出版社,2000.
[2]梁尚鸿、李幼铭等,利用区域地震台网振幅比资料测定小震震源参数,地震学报,地震出版社,1984,27,3.
[3]高文学,马瑾.首都圈地震地质环境与地震灾害[M].地震出版社,1993.
[4]孟晓春.地震观测与分析技术(分析技术分册)[M].地震出版社,1998.
[5]魏勃林.震源机制变化的机理—转换应力场[M].地震出版社,1994.
[6][美]Bruce A.Bolt.地震九讲[M].地震出版社,2000.
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