Editing Tunguska event (section)

====Blast pattern====
The explosion's effect on the trees near the explosion's [[hypocentre]] was similar to the effects of the conventional [[Operation Blowdown]]. These effects are caused by the [[blast wave]] produced by large air-burst explosions. The trees directly below the explosion are stripped as the blast wave moves vertically downward, but remain standing upright, while trees farther away are knocked over because the blast wave is travelling closer to horizontal when it reaches them.

Soviet experiments performed in the mid-1960s, with model forests (made of matches on wire stakes) and small explosive charges slid downward on wires, produced butterfly-shaped blast patterns similar to the pattern found at the Tunguska site. The experiments suggested that the object had approached at an angle of roughly 30 degrees from the ground and 115 degrees from north and had exploded in midair.<ref>{{IMDb title|id=1156463|title=Siberian Apocalypse}}</ref>