Tunguska event

The Tunguska event was a large explosion that occurred near the Stony Tunguska River in Yeniseysk Governorate, Russia, on the morning of 30 June 1908. The explosion over the sparsely populated Eastern Siberian Taiga flattened 2,000 square kilometres of forest, yet caused no known human casualties. The explosion is generally attributed to the air burst of a meteoroid.