摘要
本文依据京津唐沧地区近廿年的形变剖面及华北地区跨断层短基线、短水准测量资料,阐明唐山地震前,在1972年至1976年的孕育期间,区内主要构造活动有明显加强,北东及北北东走向断裂尤为明显。各位移测量点先后均发生不同程度的趋势性转折。从区内分布的23个测量点的变化,显示出各断裂运动的时空次序是由外圈的非发震构造向发震构造逐步推进,最后发展到震源体内部。这一过程的规律性对探讨用形变手段来监测破坏性地震具有一定的现实意义。
According to the profiting of ground deformation in Beijing-Tianjin-Tangshan-Cangzhou district and the results from short base line measurements across faults and short-range levellings in North China for the last twenty years, it has been recognized that in the seismogenic period of 1972-1976 before the Tangshan earthquake tectonic motions in North China had obviously intensified along the main geologic structures, particulary along the NE and NNE striking faults. The trend trunings of the measured values had appeared one after the other at all the measuring points of displacement. From the changes of measured values at 23 measuring points which are distributed over North China a time -space sequence of fault motions could be seen as follows: the motions developed successively from the outer non-seismic structures towards the seismogenic structures , finally into the interior of the source body. To understand the regularity of this process is significant in the practice to monitor the destructive earthquake by means of deformation measurement.
出处
《中国地震》
CSCD
北大核心
1989年第2期63-69,共7页
Earthquake Research in China
