福建数字地震台网测定中国台湾中深源地震研究
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摘要
对比福建数字地震台网测定的中国台湾中深源地震目录与中国台湾中央气象局公布的相应中深源地震目录,分析震源位置和发震时刻的差别情况,基本认为:福建台网测定中国台湾中深源地震的结果,在震中位置上,纬度偏大,即偏北;经度偏小,即偏向台网方向;采用单纯型方法定位的结果,发震时刻略偏小,震源深度偏小较多;用Locsat方法定位的结果发震时刻略偏大,震源深度较接近中国台湾测定的深度。分析目录差别的可能原因,在现有工作系统下,对测定中国台湾中深源地震提出一些建议。
The catalogs of the mid-deep seated earthquake in Taiwan of China that are determined by Taiwan s Central Weather Bureau of China and Fujian Digital Seismic Network, respectively, are contrasted. The difference between earthquake source location and the occurred time are analyzed. It is found that, for the location determined by Fujian Seismic Network, the latitude is slightly larger, that is, bias to north, the longitude is slightly smaller, that is, bias to the network; with the simplex method, the occurred time is slightly smaller, the depth is much smaller; with the Locsat method, the occurred time is slightly larger, the depth closes to or slightly deeper than that determined by Taiwan of China. According to the existing work system,the reasons for the difference are analyzed and some suggestions for the determination of middle-deep earthquakes in Taiwan of China are proposed here.
The catalogs of the mid-deep seated earthquake in Taiwan of China that are determined by Taiwan s Central Weather Bureau of China and Fujian Digital Seismic Network, respectively, are contrasted. The difference between earthquake source location and the occurred time are analyzed. It is found that, for the location determined by Fujian Seismic Network, the latitude is slightly larger, that is, bias to north, the longitude is slightly smaller, that is, bias to the network; with the simplex method, the occurred time is slightly smaller, the depth is much smaller; with the Locsat method, the occurred time is slightly larger, the depth closes to or slightly deeper than that determined by Taiwan of China. According to the existing work system,the reasons for the difference are analyzed and some suggestions for the determination of middle-deep earthquakes in Taiwan of China are proposed here.
引文
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李克,赵仲和,宋彦云,李明,等.地震学与地震观测[M].北京:地震出版社,2007:172．
王平,狄秀玲,李少睿,等.用爆破事件检验区域数字地震台网常规地震定位方法的定位精度[J].地震地磁观测与研究,2006,27(3) :25 28．
王周元,何少林,李勇,姬凤英.中国中深源地震分布特征及其意义[J].西北地震学报,2000,22(3) :288-295．
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