Tunguska event
The Tunguska event was a massive ~12 Mt explosion that occurred near the Podkamennaya Tunguska River in Yeniseysk Governorate (now Krasnoyarsk Krai), Russia, on the morning of June 30, 1908. The explosion over the sparsely populated Eastern Siberian Taiga flattened an estimated 80 million trees over an area of of forest, and eyewitness reports suggest that at least three people may have died in the event.&lt;ref name="SAO/NASA - ADS"&gt;&lt;/ref&gt; The explosion is generally attributed to the air burst of a stony meteoroid about in size. The meteoroid approached from the east-southeast, and likely with a relatively high speed of about 27 km/s. It is classified as an impact event, even though no impact crater has been found; the object is thought to have disintegrated at an altitude of rather than to have hit the surface of the Earth.