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依据6个钻孔应力—应变连续观测资料,研究了区域应力场的变化,结果表明在2000年10月整个青藏高原周边应力场发生了显著的变化。与昆仑山口西8.1级地震前的地震活动时空分布进行了对比,研究发现发生在2000年9月的兴海震群和2000年10—11月的唐古拉山震群是这次8.1级地震在孕震过程中的一次应力积聚释放的结果。
Based on the six continuous stress-strain data, the change of regional stress field was studied. The results show that the stress field around the Tibetan Plateau changed significantly in October 2000. Compared with the spatial-temporal distribution of seismic activity before the M 8.1 M 8.1 earthquake, it is found that the Xinghai earthquake swarm occurred in September 2000 and the Tanggula earthquake swarm in the October-November 2000 are the result of the 8.1-magnitude earthquake The result of a stress accumulation and release during the earthquake.