摘要
通过对青藏块体东北缘重力观测资料进行整体平差计算 ,系统分析了 1 992～ 2 0 0 1年重力场的时空动态演化特征及其与地震活动的关系 .结果表明 :利用统一起算基准获得的青藏块体东北缘重力观测资料 ,较完整地反映了青藏块体东北缘孕震过程中出现的流动重力前兆信息 .在地震孕育发生阶段 ,重力场出现较大范围的区域性重力异常 ,并产生与地震孕育发生有关的局部重力异常区 .重力场动态图象较清晰地反映了区域重力场的有序性演化与地震活动 .
The relationship between temporal-spatial evolution of gravity and earthquake activity during 1992～2001 has been analyzed systematically by integrally adjusting the gravity observation data of the northeastern edge of Qinghai-Xizang (Qingzang) block. The result shows that the gravity observation data of the northeastern edge of Qingzang block obtained by using the uniform starting datum can completely reflect the precursory gravity information appearing during the seismogenic process. In the genesis stage o...
出处
《地震学报》
CSCD
北大核心
2004年第S1期76-84,186,共9页
Acta Seismologica Sinica
基金
中国地震局"十五"重点科研项目"强震中期预测"(10 0 5 0 1 0 5 0 5 )资助
关键词
青藏块体东北缘
重力场演化
构造活动
孕震特征
northeastern edge of Qinghai-Xizang block
gravity evolution
tectonic activity
seismogenic characteristics
