AZF (factory) - Toulouse Chemical Factory Explosion

Toulouse Chemical Factory Explosion

On 21 September 2001, a huge explosion occurred in the AZF fertiliser factory in Toulouse, France, belonging to the Grande Paroisse branch of the Total group.

Three hundred tonnes of ammonium nitrate was stored (the maximum capacity was 2,000 tonnes) in the hangar #221. The whole factory was destroyed making a crater of depth 20 to 30 m (65 to 100 ft), with a diametre of 200 m (650 ft); steel girders were found 3 km away from the explosion. The blast measured 3.4 on the Richter scale, with an estimated power equivalent to 20-40 tons of TNT. The explosion was heard 80 km away (50 miles). Due to the acoustics of the hills and the large sound, the explosion was reported as occurring in multiple places. Police at first believed that at least five bombs had simultaneously gone off. There is still controversy over the exact number of explosions.

The factory was close to the city: one of the most inhabited areas, Le Mirail, is just one kilometre away (0.6 miles). Several schools, one university campus, one hospital and a psychiatric hospital had to be evacuated.

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