The Halifax Explosion occurred on Thursday December 6 1917 at 9:04:35 a.m. local time in Halifax, Nova Scotia in Canada, when the French munitions ship Mont-Blanc, bound for World War I France, collided with the Norwegian ship Imo chartered to carry Belgian relief supplies. In the aftermath of the collision, Mont-Blanc caught fire and exploded, killing 2,000 people and injuring thousands more. The explosion caused a tsunami, and a pressure wave of air that snapped trees, bent iron rails, demolished buildings, and carried fragments for kilometres. This was the largest artificial explosion until the first atomic bomb test explosion in 1945 and still ranks highly among the largest artificial non-nuclear explosions.