关于网外地震的定位问题——利用福建区域数字地震台网资料测定台湾地震震源位置
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摘要
针对地壳内部的网外地震震源的定位问题 ,由震相组合成不同的方程组 ,利用均值寻查定位法迭代求解。在选取地球物理参数模型时 ,考虑了台湾地震部门定位时所用的模型和华南地区地震走时表等。利用福建数字地震台网记录到的绕射波Pn、Sn 的到时资料 ,通过定位程序测定了 134个位于台湾区域的壳内地震的震源位置。测定结果与台湾地震部门在其网址上公布的结果进行比对 ,平均震中位置相差 9km ,震源深度相差 8km
In the paper, aiming at the location problem of network outskirt earthquakes in crust and according to the different equation groups combined by phase combination as well as using average value inquiring iterative method, we solved the hypocenter locations. When selecting the geophysical parameter model we considered the model used by the Taiwan seismic sector as well as the seismic travel-time table in south China. Using the arrival time data of P_n,S_n round wave recorded by the Fujian digital seismic network, the location program determined the hypocenter of earthquakes occurred in the crust of the Taiwan region. Comparing the determined results with the ones publicized on web site of the Taiwan seismic sector, the averaged value from their differences is 9 km in epicenter and 8 km in depth.
In the paper, aiming at the location problem of network outskirt earthquakes in crust and according to the different equation groups combined by phase combination as well as using average value inquiring iterative method, we solved the hypocenter locations. When selecting the geophysical parameter model we considered the model used by the Taiwan seismic sector as well as the seismic travel-time table in south China. Using the arrival time data of P_n,S_n round wave recorded by the Fujian digital seismic network, the location program determined the hypocenter of earthquakes occurred in the crust of the Taiwan region. Comparing the determined results with the ones publicized on web site of the Taiwan seismic sector, the averaged value from their differences is 9 km in epicenter and 8 km in depth.
引文
丁志峰、曾融生,1990京津唐地区震源深度分布初探,地震学报,12(3),242～247。
傅淑芳、刘宝诚、李文艺编,1980,地震学教程,下册,4～5,北京:地震出版社。
范玉兰、林纪曾,1990,华南地区地震走时表的研制,华南地震,10(2)。
唐国兴,1979,用计算机确定地震参数的一个通用方法,地震学报,1(2),186～196。
周仕勇、许忠淮、韩京等,1999,主地震定位法分析以及1997年新疆伽师强震群高精度定位,地震学报,21(3),258～265。
赵仲和,1983,北京地区地震参数与速度结构的联合测定,地球物理学报,26(2),131～139。
朱介寿等编著,1988,地震学中的计算方法,北京:地震出版社。
汪素云、高阿甲、许忠淮等,2000,青藏高原东北地区地震重新定位及其活动特征,地震学报,22(3),241～248。
Roecker,S .W .,Y .H .Yeh,Y .B .Tsai,1987,Three dimensionalPandSwavevelocitystructuresbeneathTaiwan:deepstructurebeneathanarc-continentcollision,J .G .R .92,B10,10547～10570.
傅淑芳、刘宝诚、李文艺编,1980,地震学教程,下册,4～5,北京:地震出版社。
范玉兰、林纪曾,1990,华南地区地震走时表的研制,华南地震,10(2)。
唐国兴,1979,用计算机确定地震参数的一个通用方法,地震学报,1(2),186～196。
周仕勇、许忠淮、韩京等,1999,主地震定位法分析以及1997年新疆伽师强震群高精度定位,地震学报,21(3),258～265。
赵仲和,1983,北京地区地震参数与速度结构的联合测定,地球物理学报,26(2),131～139。
朱介寿等编著,1988,地震学中的计算方法,北京:地震出版社。
汪素云、高阿甲、许忠淮等,2000,青藏高原东北地区地震重新定位及其活动特征,地震学报,22(3),241～248。
Roecker,S .W .,Y .H .Yeh,Y .B .Tsai,1987,Three dimensionalPandSwavevelocitystructuresbeneathTaiwan:deepstructurebeneathanarc-continentcollision,J .G .R .92,B10,10547～10570.
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