AZF (factory)
AZF (French initialism for "AZote Fertilisant", i.e. nitrogen fertiliser) was the name of a chemical factory in Toulouse, France, which exploded on 21 September 2001. The blast was equivalent to 20-40 tons of TNT, producing an earthquake with a magnitude of 3.4, and was heard 80 km away (50 miles). The incident resulted in 29 deaths and left 2,500 wounded. Damages paid by insurance companies exceeded 1.5 billion euros.