Ufa train disaster

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Coordinates: 54°56′38″N 57°5′10″E / 54.94389°N 57.08611°E / 54.94389; 57.08611

The Ufa train disaster was an explosion on the Kuybyshev Railway on June 4, 1989 at 1:15 (local time) in the Soviet Union, about 50 kilometers from the city of Ufa. It was the most deadly railway accident in Soviet history.

The explosion occurred when a leaking liquified natural gas[1] pipeline created a highly flammable cloud that was ignited by sparks created by two passenger trains passing each other nearby. Both trains were carrying many children: one was returning from a holiday vacation on the Black Sea and the other was taking children there.[2] Estimates of the size of the explosion have ranged from 250-300 tons of TNT equivalent[3] up to 10,000 tons of TNT equivalent.[1] According to official figures, 575 people died and more than 800 were injured.[1][4] The exact location was near the town of Asha.

Three hours before the explosion, pipeline engineers noticed a drop in pressure, but they increased the pressure back to normal instead of checking for leaks.[5]

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