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本文用波谱的方法估算了云南省及其邻区部分中强地震的应力降,初步讨论了应力降的分布特征。并指出,不同地区不同类型的地震,其应力降也有所不同。震群地区的地震一般应力降较低,主震型的大地震往往发生在应力降高的地区,单个地震发生以后,其应力降的高低与后续地震的大小有关,这对估计地震发生的趋势有一定的的意义。
In this paper, the stress drop of some moderate earthquakes in Yunnan Province and its adjacent areas is estimated by spectral method. The distribution of stress drop is discussed preliminarily. And pointed out that different types of earthquakes in different regions, the stress drop is also different. The general stress drop of earthquakes in the swarm is low. The major earthquakes of large earthquakes often occur in the areas where the stress decreases. After a single earthquake, the stress drop is related to the magnitude of subsequent earthquakes, which is an important measure for the occurrence of earthquakes Have a certain meaning.