| 天津及邻区1999～2000年地震震源机制研究 |
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| 引用本文： | 马淑芹,栗连弟,岳秀霞.天津及邻区1999～2000年地震震源机制研究[J].地震地磁观测与研究,2001,22(3):17-22. |
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| 作者姓名： | 马淑芹 栗连弟 岳秀霞 |
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| 作者单位： | 1. 天津市地震局
2. 北戴河地震台 |
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| 摘 要： | 文中使用的是天津市、河北省地震台的 P,Pn波初动方向资料 ,研究了 1 999～ 2 0 0 0年发生在天津及邻区的 4个地震的震源机制。其中 1 999年 8月 1 1日河北省大城县 ML 3.1地震发生在大城断裂上 ,震源机制解的节面 (走向 2 0 8°,倾角 54°,滑动角 1 2°)与大城断裂的走向一致。2 0 0 0年 1月 2 6日蓟县 ML 3.3地震发生在蓟县 -邦均断裂上 ,震源机制解的节面 (走向 2 85°,倾角 77°,滑动角 1 38°)与蓟县 -邦均断裂的走向一致。表明这两个断层在活动 ,这两个地震发生在多年来 (有感 )地震不多的地区 ,并且是发生在首都圈中部 ,应该引起注意
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| 关 键 词： | 震源机制解 天津 河北 震源物理 有感地震 蓟县－邦均断裂 |
| 修稿时间： | 2001年2月19日 |
Researches on earthquake focus mechanism in Tianjin and nearby during 1999～2000 |
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| Ma Shuqin ,Li Liandi and Yue Xiuxia Seismological Bureau of Tianjin,Tianjin ,China Seismic Station of Beidaihe,Hebei Province ,China.Researches on earthquake focus mechanism in Tianjin and nearby during 1999～2000[J].Seismological and Geomagnetic Observation and Research,2001,22(3):17-22. |
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| Authors: | Ma Shuqin Li Liandi and Yue Xiuxia Seismological Bureau of Tianjin Tianjin China Seismic Station of Beidaihe Hebei Province China |
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| Institution: | Ma Shuqin 1),Li Liandi 1) and Yue Xiuxia 2) 1)Seismological Bureau of Tianjin,Tianjin 300201,China 2)Seismic Station of Beidaihe,Hebei Province 066100,China |
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| Abstract: | Four earthquake focus mechanisms are studied in this paper which occurred in Tianjin its neighboring vegion from 1999 to 2000.By using ,Pn first motions of Tianjin and Hebei Province Seismograph stations.Among them,the Dacheng ML 3.1 earthquake on August 11,1999 occurred in Dacheng fault,the nodal plane Ⅱ in its focus mechanism solution(strike azimuth 208°,dip angle 54°,slip angle 12°)agrees with the strike of the Dacheng fault.The Jixian ML 3.1 earthquake on January 26,2000 occurred in Jixian-Bangjun fault.The nodal plane Ⅱ in its focus mechanism solution(strike azimuth 285°,dip angle 77°,slip angle 138°)agrees with the strike of the Jixian-Bangjun fault.They indicate that the two faults are in action.These two earthquakes happed in the zones where seismicity is low for many years,besides,they located in the middle part of the capital city,and attention from earthquake prediction society should be attracted. |
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| Keywords: | focal mechanism solution Tianjin |
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