The 1908 Tunguska event and some mini-Tunguskas

Andrei Ol'khovatov 

This paper is a continuation of a series of works, devoted to various aspects of the 1908 Tunguska event. This paper is devoted to several events which can be called as mini-Tunguskas. Their manifestations are in some ways similar to the 1908
Tunguska event, only on a much smaller scale. Often initially such events were interpreted as meteoroidal bolides or even meteorite falls. However, the reality turned out to be different. The geophysical nature of these phenomena was revealed, and in
several cases, they were clearly linked to earthquakes. When they are suspected of being associated with an earthquake, they are usually referred to as the earthquake
lights. Probably, the meteorological factor also plays a certain role. The physical mechanism of the phenomena remains unknown, although, judging by indirect
evidence, electromagnetic processes play a significant role. The author inclines to think the mechanism is connected to poorly understood coupling between
subterranean processes and processes in external space (atmosphere, etc.).