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确定了贝加尔地区1991~1996年期间81次能级K≥10.0(M≥3.0)的地震的震源机制。在裂谷带中部的大量震源中发现应力状态有很高的稳定性特征:压应力轴近垂直,张应力轴和中等应力轴近水平。在裂谷带西南和东北应力轴有各种各样的走向,但都与震源中的位移类型相对应。新的资料与地壳处于水平拉张条件下的贝加尔地区内进行的应力释放过程总趋势是一致的。为了高效地获得信息,把大型计算机求得的震源参数与用手工分析原始资料得到的结果进行了比较。
The focal mechanism of 81 earthquakes with energy level K≥10.0 (M≥3.0) during the period from 1991 to 1996 in Baikal region was determined. In a large number of focal sources in the central part of the rift zone, the stress state was found to have very high stability characteristics: the compressive stress axis is near vertical, the tensile stress axis and the middle stress axis are near horizontal. There are various trends in the stress axis in the southwest and northeast of the rift zone, but all correspond to the type of displacement in the source. The new trend is consistent with the general trend of stress release in the Baikal region, where the crust is under horizontal tension. In order to obtain the information efficiently, comparisons between the source parameters obtained by the mainframe computer and those obtained by manual analysis of the original data were carried out.