It was the forerunner to the Hawthorn Crater and the Lochnagar Crater during the Battle of the Somme on 1 July 1916 (along with the 15 others detonated on that day).
The Hawthorn detonation was filmed and there's a Quicktime movie on the link(!) - it shows up occasionaly on TV.
8 posted on 07/30/2005 8:48:19 PM PDT by solitas
(So what if I support an OS that has fewer flaws than yours? 'Mystic' dual 500 G4's, OSX.4.2)