Interesting Historical account of that ship and the surrounding area affected by that explosion. Thanks for posting it.
Wasn’t an ammonium nitrate explosion (military high explosive being shipped to Europe) but the Halifax ship explosion in 1917 killed 2,000 people (including some from a tsunami in the harbor) and was the largest explosion ever prior to the Trinity nuclear test. My sister does our genealogy but I think I had a distant relative killed in the blast:
http://en.wikipedia.org/wiki/Halifax_Explosion