A bit of grim history for you.
The world’s largest conventional explosion (that status a bit disputed) occurred on Thursday, December 6, 1917, when the city of Halifax, Nova Scotia, Canada, was devastated by the huge detonation of a French cargo ship, fully loaded with wartime explosives, which accidentally collided with a Norwegian ship in “The Narrows” section of the Halifax Harbour. About 2,000 people (mostly Canadians) were killed by debris, fires, or collapsed buildings and it is estimated that over 9,000 people were injured.
The Wikipedia article(1) continues: “All buildings and structures covering nearly two square kilometres along the adjacent shore were obliterated, including those in the neighbouring communities of Richmond and Dartmouth. The explosion caused a tsunami in the harbour and a pressure wave of air that snapped trees, bent iron rails, demolished buildings, grounded vessels, and carried fragments of the Mont-Blanc for kilometres.”
The scale of the disaster is enough to nearly take your breath away reading about it, all the more as you observe the slowly unfolding disaster. Before the explosion occurred, “Hundreds of onlookers gathered on the shores of the harbour, watching as Mont-Blanc eventually drifted into Pier 6 on the Richmond waterfront.” People, unaware of the ship’s cargo, valiantly tried to put out the fire. And then the explosion struck.
At 9:04:35 AM, the cargo of Mont-Blanc exploded with more force than any man-made explosion before it, equivalent to roughly 3 kilotons of TNT. (Compare to atomic bomb Little Boy dropped in Hiroshima, which had an estimated power of 13 kilotons TNT equivalent.). The ship was instantly destroyed in the giant fireball that rose over 1.9 kilometres (1.2 mi) into the air, forming a large mushroom cloud. Shards of hot metal rained down across Halifax and Dartmouth. The force of the blast triggered a tsunami, which rose up as high as 18 metres above the harbour’s high-water mark on the Halifax side. It was caused by the rapid displacement of harbour water near the blast, followed by water rushing back in towards the shore. The effects were likely compounded by the narrow cross-section of the harbour. There was little information documented on this event as witnesses were generally stunned and injured as the wave washed ashore, though the wave contributed to the death toll, dragging many victims on the harbour front into the waters. Imo was lifted up onto the Dartmouth shore by the tsunami. Captain Haakon From and most of the crew that were on the bridge of the Imo and on its decks were killed by the tsunami. A black rain of unconsumed carbon from the Mont-Blanc fell over the city for about 10 minutes after the blast, coating survivors and structural debris with soot.
Three kilotons of TNT might not sound like a lot compared to 13 tons in the Little Boy atomic explosion, but I find it staggering that a ship-load of conventional explosives could produce almost one quarter the destructive force of an atomic bomb. That is a lot of power.
Not only was the town flattened in a manner similar to Hiroshima, but:
Fragments of Mont-Blanc rained down all over the city. A portion of Mont-Blanc’s anchor shaft, weighing 517 kilograms (1140 lb) was thrown 3.78 kilometres (2.35 mi) west of the blast on the far side of the Northwest Arm, which is now part of a monument at the corner of Spinnaker Dr. and Anchor Dr., while a gun barrel landed in Dartmouth, over 5.5 kilometres (3.5 mi) east, near Albro Lake. A piece of wreckage was driven into the wall of St. Paul’s Church, where it remains today.
I want to cringe and shudder when I read things like,
Many of the wounds were also permanently debilitating, with many people partially blinded by flying glass. Thousands of people had stopped to watch the ship burning in the harbour, with many people watching from inside buildings, leaving them directly in the path of flying glass from shattered windows. Roughly 600 people suffered eye injuries, and 38 of those lost their sight permanently.
And,
The only surviving member at the scene was Patricia driver Billy (William) Wells, who was in the vehicle at the time of the blast. He recounts the event for the Mail Star, October 6, 1967,
“ That’s when it happened … The first thing I remember after the explosion was standing quite a distance from the fire engine … The force of the explosion had blown off all my clothes as well as the muscles from my right arm… ”
It is explained that Billy was standing again as the tsunami came over him. He managed to remain on land.
“ …After the wave had receded I didn’t see anything of the other firemen so made my way to the old magazine on Campbell Road … The sight was awful … with people hanging out of windows dead. Some with their heads off, and some thrown onto the overhead telegraph wires … I was taken to Camp Hill Hospital and lay on the floor for two days waiting for a bed. The doctors and nurses certainly gave me great service ”
For a story of disaster, heroism, and the destructive force of explosive, read the entire Wikipedia article.
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(1)http://en.wikipedia.org/wiki/Halifax_Explosion