| 关中地区重力场动态演化特征与地震活动分析 |
| |
| 引用本文： | 高好林,邵辉成.关中地区重力场动态演化特征与地震活动分析[J].大地测量与地球动力学,2005,25(1):91-97. |
| |
| 作者姓名： | 高好林 邵辉成 |
| |
| 作者单位： | 陕西省地震局,西安,710068;陕西省地震局,西安,710068 |
| |
| 摘 要： | 系统分析了陕西关中测区1983～2003年的流动重力观测资料,研究了重力场的时空动态演化特征,结 果表明:①地震孕育阶段,伴随异常点段增多,重力场在一定范围内出现区域性的重力负异常,地震往往发生在异 常区的边缘或重力异常梯度带上,震后逐渐回升;②重力场变化图像较好地反映了在区域应力场和震源应力场作 用下断层活动引起的重力效应;③关中重力场的转折变化受制于大区域应力场的影响和作用。
|
| 关 键 词： | 关中地区 重力场演化 地震活动 重力异常梯度带 应力场 |
| 文章编号： | 1671-5942(2005)01-0091-07 |
| 修稿时间： | 2004年6月14日 |
EVOLUTIONARY CHARACTERISTICS OF GRAVITY FIELD AND ANALYSIS OF SEISMICITY IN GUANZHONG REGION |
| |
| Gao Haolin,Shao Huicheng.EVOLUTIONARY CHARACTERISTICS OF GRAVITY FIELD AND ANALYSIS OF SEISMICITY IN GUANZHONG REGION[J].Journal of Geodesy and Geodynamics,2005,25(1):91-97. |
| |
| Authors: | Gao Haolin Shao Huicheng |
| |
| Abstract: | The mobile gravity data in the period from 1983 to 2003 in Guanzhong region of Shanxi is systematically analyzed and the dynamical evolution characteristics in time and spatial domains are studied. From the results we have the following understanding. First, in seismogenic stage,with increase in segments of anomaly, there is regional negative gravity anomaly in certain area of Guanzhong region. The earthquakes often take place in the edge or gradient zone of regional gravity anomaly. After the earthquake, it gradually rise. Second,the pattern of gravity change reflects gravity effect by fault activity in regional and seismic source stress field. Third, The evolutionary process of gravity field is restricted by the stress field in a large region. |
| |
| Keywords: | Guanzhong region enolution of gravity field seismicity abnormal zone of gravity gradient strain field |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
|
