On December 6, 1917 a series of events led up to a disaster that killed nearly 2,000 people in Halifax and injured many more. 12,000 homes were damaged and 6,000 people were left without shelter. To make matters worse, a blizzard descended on the town shortly after the explosion.
Fragments of the Mont Blanc erupted like a volcano, taking with it several of the harbor piers. The barrel of one of the ship's guns landed 3 1/2 miles away. Part of the anchor weighing 1,140 pounds landed in the ground 2 miles from the explosion. Destruction spread over 320 acres.
Other links:
http://www.halifaxexplosion.org/intro.html
http://www.halifaxhistory.ca/HalifaxExplosion.htm
http://www.environmentalgraffiti.com/news-halifax-explosion
Images and Maps
Halifax Explosion
There is also a DVD