Sasovo explosions
Two powerful blasts near the Russian town of Sasovo, in 1991 and 1992, left craters and broken windows; locals reported glowing objects.
1991 CE · 54.35, 41.92 · status: disputed
The account
The first explosion, in the early hours of 12 April 1991, smashed windows across town and left a crater about 28 m wide; a second followed on 8 July 1992. Sources give the energy as roughly 25 tonnes of TNT. Some residents reported luminous balls before the blasts, and theories ranged from UFOs to geophysical gas releases.
The sceptical view
Investigators considered buried explosives, a gas or geological outburst and a meteorite; no meteorite material was found. A man-made blast is widely suspected for at least the first event. (Wikipedia gives the first date as 1990; most Russian sources say 1991.)
The researched reading
Two genuine explosions with real craters. A blast of stored fertiliser or munitions, perhaps deliberate, explains them best; a gas outburst is a weaker natural alternative.
| Explanation | Weight | Why |
|---|---|---|
| Something in the surroundings | 45% | The surroundings included about 30 tonnes of ammonium nitrate stored nearby, and military investigators favoured an explosion of fertiliser or buried munitions; ammonium nitrate blasts of this size are well documented. |
| A known natural phenomenon | 22% | Some Russian geophysicists proposed a gas outburst from deep faults; such outbursts are rare but known, and the region lies on a platform with weak seismic activity. |
| Perception, memory or mind | 10% | The "fireballs before the blast" were reported afterwards, in a period when UFO stories filled the Soviet press. |
| Undetermined | 7% | The share the reading had given to fabrication on doubt rather than evidence: the record does not settle it either way. |
| A cultural story | 6% | Post-Soviet press turned the blasts into a UFO and anomaly story that grew with retelling. |
| A hoax or fabrication | 5% | A deliberate criminal or military blast disguised as a mystery, or later exaggeration of the glowing balls, is possible; the second blast in 1992 fits a deliberate act. |
| Genuinely anomalous | 5% | The blasts were real and their cause was never fixed officially, but an explosion of stored chemicals or munitions covers the physical evidence. |
Official position: Soviet investigators did not settle the cause; military specialists favoured stored ammonium nitrate or buried munitions, pending Academy of Sciences analysis.