According to seismological and geodetic data, the central part of the South Baikal basin is under an extension regime of the Earth’s crust. This study presents for the first time seismological evidence of a transtensive stress field in a local area adjacent to the eastern side of the Central Baikal subbasin. Two independent approaches to determining the orientation of the principal stress axes show a subhorizontal orientation of the axes of stresses of minimum and maximum compression, which results in a strike–slip component in the focal mechanisms of the earthquakes. The area under consideration is a part of the Ust’-Barguzin transfer zone, in which the transfer of deformations between South Baikal and the Barguzin basin takes place. The results obtained are in agreement with the geological and structural data and may indicate the contribution of horizontal displacements in the transfer of deformations between the segments of the rift zone.

中文翻译：

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Ust'-Barguzin 转移带（贝加尔湖中部）：关于地壳跨应力场的地震学证据

根据地震和大地测量数据，南贝加尔湖盆地中部处于地壳伸展状态。本研究首次提供了与中贝加尔湖盆地东侧相邻的局部地区存在跨张应力场的地震学证据。确定主应力轴方向的两种独立方法显示了最小和最大压缩应力轴的亚水平方向，这导致地震震源机制中的走滑分量。所考虑的区域是乌斯季-巴尔古津转移带的一部分，在那里发生了南贝加尔湖和巴尔古津盆地之间的变形转移。