The Disastrous Water—Stone Flow in the Kyngarga River (Republic of Buryatia) on June 27–29, 2014, according to Seismological Data

Abstract

This paper reports on the results of the seismic studies on the disastrous water-stone flow passing down the Kyngarga River (Republic of Buryatia) on June 27–29, 2014, according to data of the Arshan seismic station. The spectrum-polarization analysis of velocigrams showed that the period of the flow activity of debris was accompanied by a change in the properties of microseisms. Two components appeared in the velocity spectrum: the high-frequency component (22–48 Hz) associated with the motion of the solid fraction of the debris flow and the low-frequency component (0.35–0.45 Hz) associated with the water displacement. The registered elastic vibrations are the surface waves polarized in a horizontal plane with an apparent northeastern orientation.