But the thing burned via fire, not presumably via a true detonation (which was the end result, but achieved less efficiently than what a planned detonation would do).

It is not normally possible to get an explosion out of Amonium Nitrate just via a fire, but the pressure of the massive volume surely helped.

Even if detonated, pound for pound, Amonium Nitrate has only 42% the power of TNT. https://en.m.wikipedia.org/wiki/TNT_equivalent

Would not shock me if the blast was between 500 tons and a kiloton TNT equivalent.

But the thing burned via fire, not presumably via a true detonation.

It is not normally possible to get an explosion out of Amonium Nitrate just via a fire, but the pressure of the massive volume surely helped.

Even if detonated, pound for pound, Amonium Nitrate has only 42% the power of TNT. https://en.m.wikipedia.org/wiki/TNT_equivalent

Would not shock me if the blast was between 500 tons and a kiloton TNT equivalent.