福建仙游M_L5.0级地震波形分析
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摘要
2013年9月4日,福建仙游发生ML5.0级地震,这是福建数字地震台网建成以来记录到的该区域最大地震。本文就此次地震的记录波形进行分析,结果表明:仙游ML5.0级地震的震相出现规律符合一般近震记录特征;在波形中分析出sPn震相,并据此测定地震的震源深度为11.1km,与Hyposat方法测定结果一致;用初至首波估算出震区的地壳厚度约为25.2km。
On Sep 4th,2013,the earthquake with ML5. 0 occurred in Xianyou,Fujian province. And the ML5. 0 earthquake is the maximal magnitude event in the Xianyou region since the Fujian digital seismologic observation network had been set up. In this paper,wave- form of the earthquakes is analyzed,the results show that: Xianyou ML5. 0 earthquake seismic phase appeared rule in general near record characteristics; the sPn seismic phase was found in the waveform analysis,and the earthquake focal depth is 11. 1 km,the determination results were consistent with Hyposat method; the crust thickness is about 25. 2 km by the first- motion wave in the epicentral area.
On Sep 4th,2013,the earthquake with ML5. 0 occurred in Xianyou,Fujian province. And the ML5. 0 earthquake is the maximal magnitude event in the Xianyou region since the Fujian digital seismologic observation network had been set up. In this paper,wave- form of the earthquakes is analyzed,the results show that: Xianyou ML5. 0 earthquake seismic phase appeared rule in general near record characteristics; the sPn seismic phase was found in the waveform analysis,and the earthquake focal depth is 11. 1 km,the determination results were consistent with Hyposat method; the crust thickness is about 25. 2 km by the first- motion wave in the epicentral area.
引文
[1]中国地震局监测预报司.地震学与地震观测[M].北京:地震出版社,2007:18-210.
[2]高原,周蕙兰,郑斯华,等.测定震源深度的意义的初步讨论[J].中国地震,1997,13(4),321-329.
[3]洪星,叶雯燕,邵平荣,等.台湾海峡南部一次5.0级地震sPn震相分析[J].地震地磁观测与研究,2006,25(1):26-31.
[4]洪星,杨贵,林仙坎,等.sPn震相的多台同时测定法[J].地震地磁观测与研究,2006,27(3):77-80.
[5]彼得·鲍曼.新地震观测实践手册[M].北京:地震出版社,2006:462-470.
[6]陈祥熊,林树,李祖宁,等.福建一台湾地区一维地壳速度结构的初始模型[J].地震,2005,25(2):61-68.
[2]高原,周蕙兰,郑斯华,等.测定震源深度的意义的初步讨论[J].中国地震,1997,13(4),321-329.
[3]洪星,叶雯燕,邵平荣,等.台湾海峡南部一次5.0级地震sPn震相分析[J].地震地磁观测与研究,2006,25(1):26-31.
[4]洪星,杨贵,林仙坎,等.sPn震相的多台同时测定法[J].地震地磁观测与研究,2006,27(3):77-80.
[5]彼得·鲍曼.新地震观测实践手册[M].北京:地震出版社,2006:462-470.
[6]陈祥熊,林树,李祖宁,等.福建一台湾地区一维地壳速度结构的初始模型[J].地震,2005,25(2):61-68.
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