Activity of debris-flow processes in the Baikal Region during the recent centuries

A dendrochronological technique has been applied to reconstruct the years of debris-flow migration and identify the relevant occurrence areas for the time interval from 1849 through 1977. Debris-flow areas are most pronounced in three regions: in the Eastern Sayan Mountains, in the mountain ridge at the southern end of Lake Baikal, and in the Northern Baikal Region. Debris-flows from the years 1871 and 1971 stand out as covering the largest area. There is some association of powerful debris-flows with strong earthquakes, solar activity cycles and with periods of increased rain fall.