Let's not forget the famous Tunguska incident of 1908. That is when a massive explosion levelled miles upon miles of trees, radiating outwards, and yet apparently left no crater or significant burn marks. This article, (from my favourite quasi, faux news site), claims that this could not have been caused by a meteor.
The mystery continues: Russian scientists disprove the myth of the “Tunguska meteor”
However, I thought it has long been decided that it was probably caused by a meteoric comet, exploding in the air. End of story(!?)
Let's just look at a few curious points...
1 - No serious burn marks reminds me of the many pingo's now exploding through the ice or permafrost in Siberia, leaving no significant burn marks. Could a similar thing have happened in 1908, on a larger and more concentrated scale?
2 - There remains a lake in the area. Which COULD have existed prior to the event. Or - if not a meteorite's crater - maybe this was where the methane arose from? Or - could the lake have been a repository of melted ice from an exploded comet?
3 - There is a theory that a meteor or dirty comet/s hitting North America around 12,700 years ago could explain the mass extinctions of megafauna, etc., since it would have unleashed a massive amount of CO2, leading (after a freeze) to global warming, and weather changes. Well, if the Tunguska event WAS caused by a smaller but similar meteor or comet/s, then the record should show a blip of a rise in CO2 in 1908/1909. I wonder if anyone out there wants to research this?! (On the other hand, a methane explosion might show a blip of methane rise - although an IGNITED methane explosion would also show a CO2 blip, but smaller than from a meteor/comet/s).
4 - A meteor or comet hitting permafrost, (especially if show/ice-covered), would also push loads of methane and CO2 out of the ground - that's my guess. However, there is no evidence of any strong impact, (unless it was in the area of the lake).
5 - This article states that there were weird atmospheric conditions observed, which could at least partly be explained by dust and/or gas in the air. However, some observed conditions might also point to a general geo-electrical disturbance over Eurasia. Even though I believe the event might have been caused by a comet exploding above ground, I also believe that the next hypothesis is one of a geo-electrical disturbance. This is a phenomenon I have been postulating on my own. From my thoughts concerning recent Earth Changes, including strange, "trumpets," flashes of light, and so on, I feel it is probable that Earth core, magma, and geo-magnetic field/s are responsible for these current events - as they may have been for the Tunguska event. The interesting thing is that such disturbances seem to correlate with times of increased meteor and comet activity. But, more on all this later.