The Tunguska event was an aerial explosion that occurred at 60°55′ N 101°57′ E, near the Podkamennaya (Stony) Tunguska River in what is now Evenkia, Siberia, at 7:17 AM on June 30, 1908. The size of the blast was later estimated to be between 10 and 15 megatons. It felled an estimated 60 million trees over 2,150 square kilometers.
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