On This Day In 1917

The largest explosion before the atomic age occurred on the morning of December 6, 2017 when the Mont Blanc, a munitions ship carrying 200 tons of TNT, 61 tons of gun cotton, 35 tons of Benzyl, and 2,300 tons of picric acid, exploded in Halifax harbour after being struck by a Norwegian ship. 

The explosion destroyed 325 acres of the city, left 1900 people dead and another 9000 injured.

Via Dr. Caligari's Cabinet