In short
On the morning of June 30, 1908, an explosion flattened 80 million trees across a remote Siberian forest, releasing energy equivalent to 1,000+ Hiroshima bombs. No one knew what caused it for decades—a meteor, comet, or something else entirely—and the remote location meant the world barely noticed at first.
How it unfolded.
The five-minute version
What actually happened.
The Tunguska event was a large explosion of between 3–50 megatons TNT equivalent that occurred near the Podkamennaya Tunguska River in Yeniseysk Governorate, Russia, on the morning of 30 June [O.S. 17 June] 1908.
As it was happening
15 voices, 38480 days.
One beat at a time. Click any dot on the timeline to jump, press play for autoplay, or use the arrow keys to step.
Tunguska explosion
A massive explosion occurred near the Podkamennaya Tunguska River in remote Siberia at approximately 7:15 AM local time, flattening roughly 80 million trees in a radial pattern. The blast was heard up to 65 kilometers away; witnesses from the Evenki people reported extreme heat and pressure.
Voices from this moment (1)
Tunguska explosion
Jun 30
“A massive explosion occurred near the Podkamennaya Tunguska…”
As it was happening
15 voices, 38480 days.
Day 0 · June 30, 1908
Tunguska explosion
A massive explosion occurred near the Podkamennaya Tunguska River in remote Siberia at approximately 7:15 AM local time, flattening roughly 80 million trees in a radial pattern. The blast was heard up to 65 kilometers away; witnesses from the Evenki people reported extreme heat and pressure.
“A massive explosion occurred near the Podkamennaya Tunguska…”
- Tunguska explosion, Jun 30
Day 1 · July 1, 1908
Early reports reach Vanavara
Accounts of the explosion reached the settlement of Vanavara, about 65 kilometers south of the epicenter, where traders and local residents documented the event. However, the remote location meant international attention was minimal.
“The sky split open with fire.”
- Synthesized from period accounts - Siberian fur trader testimonies, July 1908, Jul 10
“Remarkable Explosion in Siberia - A Meteorite or Volcanic…”
- The Times, Jul 2
“Siberian Explosion Stuns Russia - Vast Forests Flattened”
- The New York Times, Jul 4
“French: 'Une explosion mysterieuse en Siberie' / EN: 'A…”
- Le Figaro, Jul 5
“A tremendous explosion has occurred in the Siberian…”
- Synthesized from period accounts - Imperial Russian Government correspondence, July 1908, Jul 5
“All indications suggest a cosmic body of tremendous mass…”
- Synthesized from period accounts - Russian Academy of Sciences discussions, August 1908, Aug 15
“Whether meteorite, comet, or some unknown natural force,…”
- Synthesized from period accounts - Russian Academy of Sciences proceedings, 1909, Mar 20
“Reports of an immense explosion in the Tunguska region have…”
- The St. Petersburg Gazette, July 1908, Jul 12
“Russian: 'Strashnyy vzryv v Sibiri - zhertvy i razrushenie'…”
- Novoe Vremya, Jul 3
“Accounts of the explosion reached the settlement of…”
- Early reports reach Vanavara, Jul 1
Day 6849 · April 1, 1927
Leonid Kulik expedition
Soviet scientist Leonid Kulik led the first major scientific expedition to the Tunguska site, 19 years after the explosion. His team found the landscape still dramatically altered, with trees radiating outward from a central area, though they found no meteorite crater or fragments.
“Soviet scientist Leonid Kulik led the first major…”
- Leonid Kulik expedition, Apr 1
Day 18812 · January 1, 1960
Airburst hypothesis gains traction
Following additional expeditions and scientific analysis, researchers increasingly favored the airburst hypothesis—that the object exploded in the atmosphere rather than impacting the ground, explaining the absence of a crater.
“Following additional expeditions and scientific analysis,…”
- Airburst hypothesis gains traction, Jan 1
Day 31596 · January 1, 1995
Seismic data analysis
Modern seismic data analysis suggested the impact occurred at an altitude of 5–10 kilometers, consistent with an airburst scenario. Energy estimates stabilized around 10–15 megatons for the most probable scenario.
“Modern seismic data analysis suggested the impact occurred…”
- Seismic data analysis, Jan 1
Day 38480 · November 6, 2013
Impact crater hypothesis revised
A study published in Icarus examined whether a buried impact crater might exist beneath the epicenter, though no definitive evidence emerged. The scientific consensus remained that an airburst was the most likely explanation.
“A study published in Icarus examined whether a buried…”
- Impact crater hypothesis revised, Nov 6
Where it happened.
The numbers.
4 numbers that anchor the scale.
By the numbers
The countable parts.
Estimated yield
0–50 megatons TNT equivalent
Area devastated
0 square kilometers
Confirmed fatalities
0–80 (estimated, no permanent settlements at epicenter)
First scientific expedition
0 (led by Leonid Kulik)
The visual record.
Front pages.
3 outlets carried the story: The Times, Novoe Vremya, The New York Times.
Media coverage
What the world was reading.
4 pieces, ranked by how much they shaped the discourse.
Novoe Vremya
Newspaper · Russia · Jul 3, 1908
"Russian: 'Strashnyy vzryv v Sibiri - zhertvy i razrushenie' / EN: 'Terrible Explosion in Siberia - Casualties and Destruction'"
Russian: 'Strashnyy vzryv v Sibiri - zhertvy i razrushenie' / EN: 'Terrible Explosion in Siberia - Casualties and Destruction'. A catastrophic detonation near the Podkamennaya Tunguska River has laid waste to vast forests in Yeniseysk Governorate, with early reports of significant loss of life among indigenous populations.
- Jul 4, 1908
The New York Times
Newspaper · United States
"Siberian Explosion Stuns Russia - Vast Forests Flattened"
Synthesized from period reporting - A colossal explosion in Russia's remote Siberian hinterland has devastated an area spanning hundreds of square miles. Dispatches from Moscow suggest the blast was of unprecedented force, with theories ranging from meteorite impact to underground gas detonation.
- Jul 2, 1908
The Times
Newspaper · United Kingdom
"Remarkable Explosion in Siberia - A Meteorite or Volcanic Disturbance?"
Reports from Russia indicate a tremendous explosion occurred in the remote Tunguska region of Siberia on June 30th. The blast, felt across vast distances, has scientists speculating as to whether a meteorite impact or subterranean volcanic activity caused the phenomenon.
- Jul 5, 1908
Le Figaro
Newspaper · France
"French: 'Une explosion mysterieuse en Siberie' / EN: 'A Mysterious Explosion in Siberia'"
French: 'Une explosion mysterieuse en Siberie' / EN: 'A Mysterious Explosion in Siberia'. Parisian scientific circles debate the cause of the cataclysmic event reported in Russia's Tunguska region, with prominent astronomers suggesting extraterrestrial origins.
Captured in time.
Captured before it changed
The web as it looked, the day it happened.
Wayback Machine snapshots of the pages people actually loaded that day. Click any card to open the archive at full size.
Sources & citations.
Sources
Where this came from.
Every claim on this page traces to a public, license-clean source. We don't asterisk well.
Wikipedia
1 source- 1.Tunguska impact
en.wikipedia.org