| 晋冀鲁豫交界地区震源位置及震源区速度结构的联合反演 |
| |
| 引用本文： | 张小涛,韩丽萍,王晓山,张双凤,杨雅琼.晋冀鲁豫交界地区震源位置及震源区速度结构的联合反演[J].地震,2011,31(4):26-35. |
| |
| 作者姓名： | 张小涛 韩丽萍 王晓山 张双凤 杨雅琼 |
| |
| 作者单位： | 1. 河北省地震局邯郸中心台,河北邯郸,056001
2. 河北省地震局预测研究中心,河北石家庄,050021 |
| |
| 基金项目： | 河北省科技支撑计划项目(09276904D); 河北省地震局青年地震基金项目联合资助 |
| |
| 摘 要： | 利用邯郸数字台网记录到的2001-2008年间460次ML≥1.0地震的1861条P波到时数据,采用震源位置和速度结构联合反演方法确定晋冀鲁豫交界地区(35.0°～38.0°N,113.0°～116.0°E)地震的震源位置分布和该区域的速度结构.结果表明:①经过重新定位后,P波走时的均方根残差(RMS)由反演前的1.3...
|
| 关 键 词： | 联合反演 地震定位 速度结构 晋冀鲁豫交界地区 |
Simultaneous Inversion of Earthquake Sequence Locations and Velocity Strcture in the Juncture of Shanxi,Hebei,Shandong and Henan Provinces |
| |
| ZHANG Xiao-tao,HAN Li-ping,WAN Xiao-shan ZHANG Shuang-feng,YANG Ya-qiong.Simultaneous Inversion of Earthquake Sequence Locations and Velocity Strcture in the Juncture of Shanxi,Hebei,Shandong and Henan Provinces[J].Earthquake,2011,31(4):26-35. |
| |
| Authors: | ZHANG Xiao-tao HAN Li-ping WAN Xiao-shan ZHANG Shuang-feng YANG Ya-qiong |
| |
| Institution: | ZHANG Xiao-tao1,HAN Li-ping1,WAN Xiao-shan2 ZHANG Shuang-feng1,YANG Ya-qiong2 (1.Central Seismic station of Handan,Handan Hebei 056001,China,2.Earthquake Administration of Hebei Province,Shijiazhang 050021,China) |
| |
| Abstract: | Using 1861 P wave arrival times from 460 local earthquakes(ML≥1.0) recorded by the Handan Seismic Network from 2001 to 2008,we use the simultaneous inversion method to determine the hypocentral distribution and velocity structure in the juncture area(35.0°～38.0°N,113.0°～116.0°E) of Shanxi,Hebei,Shandong and Henan provinces.T④he results show that: ① After the simultaneous inversion of earthquake relocation and velocity structure,residual root mean square(RMS) of P wave travel time decreased from the 1.35 s to the 0.45 s,location error averaged 0.031 km in the EW direction,0.029 km in the NS direction,and average 0.060 km vertically.② Small and medium earthquakes spread in the NEE direction in the Xingtai hypocentral area,with focal depths varying from 7 to 14 km;seismicity displays two conjugated distributions in the directions of NEE and NNW in the Cixian hypocentral area with focal depths varying from 8 to 18 km.The focal depths become shallower form south to north in the juncture area.③ Low velocity layer exists in 7~14 km beneath the meizoseismal area of Xingtai earthquake,consistent with the focal depth of Xingtai M7.2 earthquake;low velocity layer also exists in 13~18 km beneath the meizoseismal area of Cixian earthquake,consistent with the focal depth of Cixian M7.5 earthquake.The velocity structure of Cixian hypocentral area is much complicated than that of Xingtai hypocentral area. |
| |
| Keywords: | Simultaneous inversion Earthquake location Velocity structure Juncture of Shanxi Hebei Shandong and Henan |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
|
