An enormously powerful explosion that occurred near the Podkamennaya Tunguska River in what is now Krasnoyarsk Krai, Russia, at about 7:14 a.m. KRAT (0:14 UT) on June 30 [O.S. June 17], 1908
Trees knocked over by the Tunguska blast. Photograph from the Soviet Academy of Science 1927 expedition led by Leonid Kulik
The explosion is believed to have been caused by the air burst of a large meteoroid or comet fragment at an altitude of 5–10 kilometres (3–6 mi) above the Earth's surface. Different studies have yielded varying estimates of the object's size, with general agreement that it was a few tens of metres across
1930-08-13; Curuçá River Area, Amazonas, Brazil
1965-05-31; Southeastern Canada (1 g (0.035 oz) material from meteorite found)
1966-09-17; USA, Michigan, Lake Huron / Canada, Ontario
1967-02-05; Canada, Alberta, Vilna
1979-09-22; Southern Indian Ocean
This controversial and assumed explosion over the Indian Ocean was named the Vela Incident, having been detected by an American Vela Hotel satellite (6911). That high-altitude sentry satellite carried several physics instruments designed specifically to detect nuclear explosions.
Three possible causes emerged over the several years following the event: 1) a secret nuclear test, likely by South Africa and/or Israel; 2) an asteroid or meteorite impact; or 3) spurious instrumentation noise on board the satellite.
Despite numerous sweeps by special US Air Force radiation detection aircraft, no airborne nuclear contaminants were detected.
1993-01-19; Italy, Lugo
1994-01-18; Spain, Cando
The Cando event was an explosion that occurred in the village of Cando, Spain, in the morning of January 18, 1994. There were no casualties in this incident, which has been described as being like a small Tunguska event.
Witnesses claim to have seen a fireball in the sky lasting for almost one minute. A possible explosion site was established when a local resident called the University of Santiago de Compostela to report an unknown gouge in a hillside close to the village. Up to 200 m³ of terrain was missing and trees were found displaced 100 m down the hill.
Opinions are divided about the causes of the explosion. Zdeněk Ceplecha of the Ondřejov Observatory in the Czech Republic explains the incident might have been a blast of subterranean gases which, removing the topsoil in a sudden explosion, vented into the air. The convective action of such a rising plume would create an electric charge separation sufficient to ignite the gases, accounting for the fireball-like observations. The same explanation has been recently circulating about the Tunguska event, against the old meteor theory. Local residents, however, claim it was a meteor, as an object "the size of a full moon" was seen in the skies of the Spanish region of Galicia. The mystery became fertile ground for conspiracy theories that point to military or "alien activities".
See also: http://en.wikipedia.org/wiki/Cando_event
1997-12-09; 150 km South of Nuuk, Greenland
2002-06-06; Eastern Mediterranean Sea
The Eastern Mediterranean Event was a high-energy aerial explosion over the Mediterranean Sea, around 34°N 21°E (between Libya and Crete, Greece) on June 6, 2002. This explosion, similar in power to a small atomic bomb, has been related to an asteroid undetected while approaching the Earth. The object disintegrated and no part was recovered. Since it did not reach the surface and it exploded over the sea, no crater was formed.
The event occurred during the 2001–2002 India–Pakistan standoff, and there were concerns by General Simon Worden that a similar explosion could have sparked a nuclear war between the two countries, had the timing been different, which would have devastated both regions, causing deaths numbering over 10 million.
2002-09-25; USSR, Siberia, Irkutsk Oblast
The Vitim event or Bodaybo event is believed to be an impact by a bolide or comet nucleus in the Vitim River basin. It occurred near the town of Bodaybo in the Mamsko-Chuisky district of Irkutsk Oblast, Siberia, Russia on September 25, 2002 at approximately 10:00 p.m. (local time). The event was also detected by a US military missile-defense satellite.
Some attempts were made to define the magnitude of the explosion. U.S. military analysts calculated it was between 0.2–0.5 kilotons, while Russian physicist Andrey Olkhovatov estimates it at 4–5 kilotons.
Information about the event appeared in the mass media and among scientists after only a week. Initially no one was able to understand the magnitude of the explosion. A small expedition, sent by the Institute of Sun–Earth Physics (Irkutsk), tried to find a meteorite within about 10 km from Bodaybo town (people told them– "it has fallen beyond the nearest mountain!").
Some people suggest that this phenomenon is similar to the Tunguska event of 1908.
2008-10-07; Sudan, Nubian Desert
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