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What happened over the Tunguska River in Siberia on 30 June 1908?
AA slow flow of thick lava
BA deep crack in the crust
CA rise in the sea level
DA blast high in the atmosphere
Answer & Solution
Correct answer: D. A blast high in the atmosphere
1. An incoming body can break up before it ever reaches the ground.
2. Over Tunguska the explosion happened about 8 kilometers up.
3. The shock wave flattened more than a thousand square kilometers of forest below.
_Source: OpenStax Astronomy (CC BY 4.0), section 8.5 Cosmic Influences on the Evolution of Earth_
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