JOE TUCCIARONE / SCIENCE PHOTO LIBRARY JOE TUCCIARONE / SCIENCE PHOTO LIBRARY
Tunguska event. Image 3 of 3. Computer artwork of the explosion of the object that caused the Tunguska event in Siberia, Russia. Lake Baikal is at lower left. North is at right. The Tunguska event was a massive explosion that took place in at 07:17 on 30 June 1908. A fireball was observed low in the sky, moving north-west. This was followed by the sounds of a massive explosion. Expeditions to the area found immense damage, with over 3000 square kilometres of forest flattened. It is thought that the explosion was a meteorite or comet breaking up and exploding above the surface. For a sequence of the Tunguska event, see images R305/218-220.
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