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本文利用道孚6.9级地震前后鲜水河断层沿线测量资料,分析了道孚6.9级地震的地形变异常过程,找出了断层的活动段和闭锁段,得到了活动段的范围大小与震级有关的认识,指出鲜水河断裂由西北往东南在时间和空间上应力逐渐推进,至闭锁段受阻而发震的规律,应视为临震地形变信息,并值得进一步探讨。 通过与炉霍7.9级地震震后复测资料的对比以及鲜水河构造带历史地震活动规律的分析,认为道孚以南近期仍有可能发生中强以上的地震。
Based on the measured data of Xianshuihe fault before and after the MS 6.9 Daofudu earthquake, the paper analyzes the terrain anomalous process of the Daofu MS 6.9 earthquake and finds out the active section and the closed section of the fault. The range of the active section is related to the magnitude It is pointed out that the stress of the Xianshuihe fault from the northwest to the southeast advances gradually in time and space and that the regularity of the seismogenic shock blocked to the blocking block should be regarded as the information of the deformity of the epicenter and deserves further discussion. Based on the comparison of the re-measured data after the MS7.0 Huohuo earthquake and the historical seismic activity of the Xianshuihe tectonic belt, it is believed that it is still possible for the south of Daofu to have an earthquake more than moderate-strong in the near future.