Two very notable ammonia nitrate explosions, in the past, were,
1) Opau explosion at a BASF plant in Opau, Germany, September 21, 1921That blast killed 561 people.
And,
2) Texas City, April, 16, 1947 which killed 581 people.
After the latter blast , ANFO* was seriously studied as a 'safe' cheap industrial explosive. The cost was so low that nitrated explosives, were quickly eclipsed, and mostly driven out of the blasting market.
Accidental ANFO explosions are unfortunately fairly common.
Try,
List of ammonium nitrate disasters - Wikipedia
For a list of many of them.
Regards to all the Iron banger fraternity,
SLAG.
*ammonium nitrate fuel oil.