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| 青藏块体及周缘潜在震源与强震关系研究 | |
| 引用本文： | 张希,江在森,王双绪,王琪.青藏块体及周缘潜在震源与强震关系研究[J].大地测量与地球动力学,2003,23(1):35-41. |
| 作者姓名： | 张希 江在森 王双绪 王琪 |
| 作者单位： | 1. 中国地震局第二地形变监测中心,西安,710054 2. 中国地震局分析预报中心,北京,100036 3. 中国地震局地震研究所,武汉,430071 |
| 基金项目： | 国家重点基础研究《大陆强震机理与预测》项目 (G19980 40 70 3)资助 |
| 摘 要： | 利用1993－1999、1999－2001年青藏块体东北以及1991－2000年中国大陆GPS水平运动年速率资料，基于单一力源模型，反演获得了青藏块体及其周缘地区2000－2001年10次地震的震前资料反映的潜在震源参数，所得力源中心位置距实际震中的距离相对较小，其中2000年景泰5．9、2001年宁蒗5．8、昆仑8．1及格尔木3次5．7、5．8级地震均在50km左右；2000年兴海6．6、2001年年施甸5．9、永胜6．0级地震不到100km；2001年雅江6．0级地震最远（121km）。此外，1999－2001年青藏块体东北缘地区的反演结果表明，沿东昆仑构造带的昆仑山口－达日及库玛断裂向东至甘东南、甘青交界区域，可能仍存在潜在震源。 |
| 关 键 词： | 潜在震源 GPS 水平运动 反演 青藏块体 震级 全球定位系统 |
| 文章编号： | 1671-5942(2003)01-0035-07 |
| 修稿时间： | 2002年9月2日 |
STUDY ON RELATIONSHIP OF POTENTIAL HYPOCENTER TO STRONG EARTHQUAKES IN QINGHAI-TIBET BLOCK AND ITS MARGINS |
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| Zhang Xi{},Jiang Zaisen{},Wang Shuangxu{} and Wang Qi{}, No. Crustal Deformation Monitoring Center,CSB,Xi'an Center for Analysis and Prediction,CSB,Beijing Institute of Seismology,CSB,Wuhan.STUDY ON RELATIONSHIP OF POTENTIAL HYPOCENTER TO STRONG EARTHQUAKES IN QINGHAI-TIBET BLOCK AND ITS MARGINS[J].Journal of Geodesy and Geodynamics,2003,23(1):35-41. | |
| Authors: | Zhang Xi{} Jiang Zaisen{} Wang Shuangxu{} and Wang Qi{} No Crustal Deformation Monitoring Center CSB Xi'an Center for Analysis and Prediction CSB Beijing Institute of Seismology CSB Wuhan |
| Institution: | Zhang Xi{1)},Jiang Zaisen{2)},Wang Shuangxu{1)} and Wang Qi{3)},1) No.2 Crustal Deformation Monitoring Center,CSB,Xi'an7100542) Center for Analysis and Prediction,CSB,Beijing1000363) Institute of Seismology,CSB,Wuhan430071 |
| Abstract: | By using the horizontal movement data observed by GPS during 1993-1999 and 1999-2001 in the northeastern margin of Qinghai-Tibet block, together with the same kind of data measured during 1991-2000 in China Mainland and on the basis of singular force-source model the parameters of potential hypocenters reflected by the precursory data of the 10 earthquakes occurred during 2000-2001 are inverted out. The distances between obtained force-source centers and real epicenters are small, for example,for earthquakes of Jingtai 5.9 in 2000, Ninglang 5.8, Kunlun 8.1 and three Gelm 5.7, 5.8 in 2001 they are about 50 km; and of Xinghai 6.6 in 2000, Shidian 5.9 and Yongsheng 6.0 in 2001 100 km less;for Yajiang 6.0 it is the longest:121 km. Moreover, the inversion result from the data of 1999-2001 in the northeastern margin of Qinghai-Tibet block indicates that eastwards along Kunlun Mountain pass-Dari and Kuma faults of East-Kunlun tectonic belt and extending eastwards to southeastern Gansu and the boundary zone between Gansu and Qinghai, it is still possible for potential hypocenters to exist. |
| Keywords: | singular force-source GPS horizontal movement inversion Qinghai-Tibet block and its margins |
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