The explosion 's effect on the trees near the hypocentre of the explosion was similar to the effects of the conventional Operation Blowdown . These effects are caused by the blast wave produced by large airburst explosions . The trees directly below the explosion are stripped as the blast wave moves vertically downward , while trees farther away are knocked over because the blast wave is travelling closer to horizontal when it reaches them
Operation Blowdown
Operation Blowdown
Tunguska event