CRUST STRESS IN NORTHEASTERN REGION OF CHINA
Rao Lixun;Wang Jin;Li Yarong Seismological Institute of Lanzhou, 73000 Lanzhou
The distribution of crust stress field in the northeastern region of China was reported in
this paper. It was obtained from the mean mechanism solutions of some earthquakes in which
the directions of principal compressive stresses are NE70°in the south part, NE100°in the
middle part and NE58°in the north part of northeastern region. Most of elevation angles of
P and T axes of mechanisms of shallow earthquakes are less than 30°degree. It represents
that the horizontal compressive stress plaies dominant role for occurring of earthquakes in
the Northeastern region of China. The slip condition of faults in the area was also discussed
based on the results of mechanisms of earthquake focuses.
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