| 关于2001年昆仑山8.1级大地震前后中国大陆地壳水平运动的讨论s |
| |
| 引用本文： | 顾国华,张晶,王武星.关于2001年昆仑山8.1级大地震前后中国大陆地壳水平运动的讨论s[J].地震学报,2003,25(6):653-660. |
| |
| 作者姓名： | 顾国华 张晶 王武星 |
| |
| 作者单位： | (中国北京100036中国地震局分析预报中心) |
| |
| 基金项目： | 国家重点基础研究发展计划(973计划)，95-13-03-07， |
| |
| 摘 要： | 中国地壳运动观测网络基准网GPS连续观测，获得了2001年11月14日昆仑山8.1级大地震前后中国大陆，特别是西部地区的地壳水平运动信息．以东部长期相互间相对水平位移很小的几个站组成的一组稳定点作为基准， 据此获得水平位移分量时间序列．2000年11月上旬起中国西部的GPS基准站开始出现显著的异常位移，此后在云南及四川发生多次6级左右的地震．自2001年4月中旬开始，中国西部GPS基准站向北的水平位移速率明显减小，甚至反向，临震前及震后略有恢复，但震后向北的水平位移速率仍减小，并有明显的向西运动．近几年中国大陆西部（相对东部）的地壳运动过程表明，印度板块的向北挤压是昆仑山8.1级大地震的主要力源，大地震释放了大量的能量，印度板块对中国大陆的作用力明显降低，大震后至2002年底中国大陆的地震活动也明显降低．
|
| 关 键 词： | 地壳运动& GPS& 地震预报& 昆仑山8.1级大地震& 时间序列 |
| 文章编号： | 0253-3782(2003)06-0653-08 |
| 修稿时间： | 2002年7月25日 |
HORIZONTAL CRUSTAL MOVEMENT IN CHINESE MAINLAND BEFORE AND AFTER THE GREAT KUNLUN MOUNTAIN M=8.1 EARTHQUAKE IN 2001 |
| |
| Gu Guohua,Zhang Jing,Wang Wuxing.HORIZONTAL CRUSTAL MOVEMENT IN CHINESE MAINLAND BEFORE AND AFTER THE GREAT KUNLUN MOUNTAIN M=8.1 EARTHQUAKE IN 2001[J].Acta Seismologica Sinica,2003,25(6):653-660. |
| |
| Authors: | Gu Guohua Zhang Jing Wang Wuxing |
| |
| Abstract: | The continuous GPS observation at the fiducial stations in the Crustal Movement Observation Network of China recorded the crustal movement of Chinese mainland before and after the great Kunlun Mountain earthquake of M =8.1 on November 14, 2001, especially the horizontal crustal movement in the western part of China. Based on the datum defined by a group of stable stations with small mutual horizontal displacements for a few years, the time series of horizontal displacements at fiducial stations were obtained. Significant anomalous horizontal displacements had appeared at the fiducial stations in the western part of China since early November 2000 and several earthquakes with magnitudes about 6.0 had occurred in Yunnan and Sichuan Provinces. The north components of the horizontal displacement at the fiducial stations in west China had decreased significantly even changed in opposite sense since mid April 2001. After the earthquake the northward displacements still decreased and there were significant westward displacements. The process of the crustal movement in the western part of Chinese mainland (in reference to east China) suggests that the main source of the force for this earthquake came from the northward pushing of the Indian plate. The great earthquake released a large amount of energy, the action applied by the Indian plate to Chinese mainland diminished significantly and after the great earthquake the seismic activity in Chinese mainland were significantly reduced until the end of 2002. |
| |
| Keywords: | crustal movement GPS earthquake prediction great Kunlun Mountain earthquake of M =8 1 time series |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
| 点击此处可从《地震学报》浏览原始摘要信息 |
|
点击此处可从《地震学报》下载全文 |
