华北东部地区的共轭地震破裂与地质构造

CONJUGATE EARTHQUAKE FRACTURE AND TECTONICS IN THE EASTERN PART OF NORTH CHINA

摘要:

本文研究了华北东部地区地震与地质构造的关系。对该地区1966-1976年发生的5次强震的震源机制、地震形变带、余震活动、极震区等震线、地形变测量资料进行了综合分析,发现华北东部地区地震破裂具有在强度上不对称的共轭剪切破裂特征;地震破裂相对于地质构造具有突出的新生性。

Abstract:

The relation between earthquake and tectonics in the eastern part of North China was examined.The starting point of examination is to analyze the tectonic appearances in occurrence processes of the strong earthquakes. By the data of focal mechanisms, surface deformations, aftershocks, isoseismals and geodetic measurements for 5 strong earthquakes occurred in 1966-1976, it was found that the earthquake fractures appear as conjugate shear fractures with asymmetric amount.There is a predominant newbornness in the relation of earthquake fracture to tectonics.