Tunguska: One Blast. 80 Million Trees. No Crater.Episode 151:33
The Crater That Never Existed
The absence that created the Tunguska mystery becomes the clue that finally resolves it—and a warning for the future.
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Transcript
The sky split in two, and fire covered the northern horizon.
Over Siberia, it happened June 30th, 1908, around 7:15 a.m.
A witness at Vanavara said they felt great heat, as if their shirt had caught fire.
Seismic instruments hundreds of miles away recorded tremors from the shock wave.
In 1921, geologist Leonid Kulik headed to the site but couldn't reach it.
Kulik arrived in 1927 and found burned, stripped trees near the epicenter.
Later surveys revealed millions of fallen trees across a butterfly-shaped destruction zone.
Models place 10 to 20 megatons in an airburst roughly 6 miles, or 10 kilometers high.
The forest preserved the blast's shape long after the explosion faded.
Kulik found destruction, but no crater or other physical evidence explaining the blast.
The Vanavara witness's account survived, preserving a human view of the blast.
The leading explanation is a stony asteroid that exploded before reaching the ground.
A mid-air explosion most likely vaporized the object; no impact crater exists.
Evidence: burned trees, eyewitness accounts, seismic records, and infrasound.
The mystery became a warning: an object can devastate a world without striking its ground.
The Planetary Defense Coordination Office funds efforts to identify near-Earth objects that could threaten the planet.
Sources
- 1908 SIBERIA EXPLOSION: Reconstructing an Asteroid Impact from Eywitness Accounts - Planetary Science Institutepsi.edusecondary
- 115 Years Ago: The Tunguska Asteroid Impact Event - NASAnasa.govsecondary
- NASA/Technical Memorandum (NASA/TM--220174) 2018ntrs.nasa.govsecondary
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