Seismo-acoustic Effects of the Lipetsk Bolide 21.06.2018

The entry and destruction of large meteoroid occurred on 21.06.2018 in the Lipetsk region. This phenomenon caused infrasound and seismic vibrations recorded by a seismic-acoustic complex GFO «Mikhnevo». The results of a comprehensive analysis of seismic-acoustic registrations are presented. It is shown that infrasound wave excites ground motions directly at the seismometer installation points. Using modern array signal processing techniques at the seismic records there were found several time intervals where the presence of acoustic wave response was established. The estimation of the source azimuth and apparent velocity of the plane wavefront according to seismic observations was obtained. The source energy is estimated based on dominant frequency of the infrasound signal recorded by microbarometer. The bearing azimuth is in agreement with the coordinates of the source provided by U.S. Government optical satellites (UGS) data.