The Tectonic Interpretation Of The 1908 Tunguska Event

Here the author's idea (first it was published in IZVESTIA ACADEMY OF SCIENCES OF USSR in 1991, and now it is already rather popular among Tunguska researchers) is explained that the famous 1908 Tunguska event in Siberia was not an impact of a stony asteroid/meteorite or a comet, but a manifestation of geophysical (terrestrial) processes: roughly speaking, a result of coupling between tectonic and atmospheric processes in very rare combination of favourable geophysical factors. In general it is based on the following:

Perusing Tunguska facts shows they don't conform with a stony meteorite or a comet fall.

Tunguska event in place and in time coincided with a strong upsurge of tectonic activity on regional and (partly) global levels.

There was strong and remarkable coincidence of Tunguska event with particular local and regional (and partly semi-global) meteorological conditions.

There were several other remarkable evidences of peculiarities in geophysical situation accompanied Tunguska.

Simultaneous realization of all these geophysical phenomena together with Tunguska as just pure accidental coincidence is very unlikely.
Remarkably, that on small scales similar geophysical micro-Tunguskas occur rather often.
The exact physical mechanism of Tunguska event is still disputable. In my opinion electromagnetic phenomena play large role in it.