Draw your own conclusions by reading the following links. At the time, the "blinding, deafening blast" was not a mystery. The "doom, doom, doom" scenario offered by many websites reminds me of dwarves in the The Mines of Moria per the Lord of the Rings.
Tunguska per Wikipedia.
Do you read Russian? [Cited by Wikipedia, original transcripts from 1908, supposedly.]
Leonid A. Kulik. Came on the scene in 1927.
Yeah, sure. I'm all for science fiction, but GMAB.
Christie at the Cape.