1908 Tunguska Airburst Flattened 2,150 Square Kilometres of Siberian Forest With 10-15 Megatons
Updated
Updated · spacedaily.com · May 23
1908 Tunguska Airburst Flattened 2,150 Square Kilometres of Siberian Forest With 10-15 Megatons
2 articles · Updated · spacedaily.com · May 23
30 June 1908 saw an object from space explode 5 to 10 kilometres above central Siberia, knocking down tens of millions of trees across about 2,150 square kilometres without leaving a crater.
Atmospheric pressure likely tore the body apart before impact, releasing its energy in an airburst whose downward shockwave produced the radial pattern of flattened forest that investigators later mapped.
1927 expeditions led by Leonid Kulik found a marshy epicentre but no meteorite or impact crater, undercutting later speculation about spacecraft, black holes or antimatter.
Estimates put the blast at roughly 10 to 15 megatons of TNT—hundreds of times Hiroshima—though the exact yield and whether the object was a stony asteroid or comet fragment remain unsettled.
Tunguska still shapes impact-risk planning because mid-sized objects are more common than crater-forming giants; the far smaller 2013 Chelyabinsk airburst still injured about 1,500 people.
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Earth’s Greatest Impact: The 1908 Tunguska Event and the Ongoing Challenge of Near-Earth Objects
Overview
The Tunguska event of 1908 in Siberia stands as Earth's largest recorded asteroid impact, demonstrating the potential for widespread destruction from such cosmic events. This historic explosion continues to shape astronomy and geology, highlighting the ongoing risk of asteroid impacts. More recently, the Chelyabinsk airburst in 2013, caused by a much smaller asteroid, injured over a thousand people and served as a stark reminder of this threat. These events underscore the critical need for robust global monitoring and defense strategies to protect our planet from future asteroid hazards.