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Teg
09-20-2011, 07:11 PM
Interesting story that does not get a whole lot of publicity, I am sure that quite a few who read this will have no idea this event ever occurred and that is really not their fault, just the result of short sighted textbooks.


The Halifax Explosion

In Richmond Prison, at the end of Gottingen Street, Halifax, the warden's young son was drawn to a window by a spectacular display of fireworks. Too sick to go to school that day he had gone to work with his dad. Suddenly he was blinded by a brilliant flash of light and then stunned by an unearthly roar. He was one of the first eyewitnesses to Canada's greatest disaster, the Halifax Explosion. He ran in terror, screaming for his father.

In the pre-dawn darkness of Thursday, December 6, 1917, the French munitions ship Mont Blanc lay at anchor near the mouth of Halifax Harbour. It seemed a small, nondescript vessel, but it carried a deadly cargo, a witch's brew of picric acid (used to make artillery shells), TNT, guncotton, benzol (a high octane fuel) and live ammunition. The ship was prevented from entering the narrows the night before by the closing of the submarine net, the same net that prevented the Imo, a Norwegian relief ship bound for Belgium, from leaving. That morning, the two ships' captains were anxious to get going. The Imo was 18 hours behind schedule and the Mont Blanc was a sitting duck in the open harbour. Twice the captain of the Imo avoided other vessels by passing on their starboard side, which was not standard procedure and brought the ship ever closer to the Dartmouth shore. There the pilot of the Mont Blanc was astonished to see the Imoadvancing. The two ships exchanged a bewildering array of contradictory horn and whistle blasts. The last seconds before the collision dissolved in indecision and then panic.

In a final, fatal maneuver both captains bellowed out orders to put their engines full speed astern. The Mont Blanclurched sideways. The Imo's bow swung about and its stern struck the Mont Blanc. The grinding of ragged metal sprayed sparks and ignited the benzol. The Mont Blanc's crew dove into the lifeboats and rowed for dear life, shouting warnings that no-one could understand. For the next 20 minutes the fiery spectacle of theMont Blanc drew a crowd of wide-eyed onlookers as it drifted ominously across the harbour towards Pier Six. In the rail yards at Richmond Station, a telegraph operator tapped out a last telegraph message: "Munitions ship on fire in the harbour. Heading for Pier Six. Good Bye." Seconds later the Mont Blanc detonated. It was the world's greatest man-made explosion before Hiroshima.

The mind numbing roar of the blast was heard as far away as Sable Island and Cape Breton. A fireball as hot as the surface of the Sun rolled over the docks, vapourizing those within its range, as if they had never existed. The metal of the Mont Blanc shattered into millions of shards moving at a velocity greater than any bullet. A sailor, J.C. Meyers, who was only 30 metres away from the blast, heard someone call "Look out!" It was the last thing that he remembered until he found himself lying on the ground at Fort Needham, over a kilometer away, wearing nothing but his boots.

Behind the fireball came a blast of air a thousand times more powerful than any hurricane, compressing the air into a steel fist, tossing railway cars like toys, smashing houses like matchsticks and crushing anyone in its path. Behind the wall of air came a deadly shower of shrapnel. In the harbour, the Imo was stripped of its superstructure and beached on the far shore. Within two seconds of the explosion the entire neighborhood of Richmond was obliterated, leaving at least 1000 people dead. In less time than it takes to draw a deep breath almost every building in Halifax and Dartmouth had been damaged. Early rescue efforts were chaotic. The city had no power and no way to tell the world. As the word of the disaster spread, medical aid, food, clothing, building materials and skilled labourers poured in from throughout the Maritimes, central Canada, New England and the world.

The official tally of the dead is 1963, but almost certainly more died. At least 9000 more were injured and 25,000 left homeless. The confusion in the city lasted months as those who had lost loved ones spent countless hours searching and asking questions that could never be answered. There was no measure for the grief. In one family alone, that of James and Elizabeth Jackson, 46 were killed and 19 injured. Wartime suspicion led many to think that the explosion must be an act of sabotage. The Halifax Herald blamed it on "that arch criminal, the Kaiser of Germany." An early enquiry inexplicably put the whole blame on the captain and pilot of the Mont Blanc. The Supreme Court of Canada portioned the responsibility, with two judges blaming the Imo, two the Mont Blanc, and the fifth deciding each had acted imprudently.

http://thecanadianencyclopedia.com/index.cfm?PgNm=ArchivedFeatures&Params=A295

Teg
09-21-2011, 10:51 AM
A sailor, J.C. Meyers, who was only 30 metres away from the blast, heard someone call "Look out!" It was the last thing that he remembered until he found himself lying on the ground at Fort Needham, over a kilometer away, wearing nothing but his boots.

If I were this gentleman I would have been very cautious for the rest of my life, because he used up all of his luck in one big pop. :D

Wyobuckaroo
09-21-2011, 06:40 PM
Interesting story. Never knew the event happened before this post.

Have seen a documentary on the Port Arthur Texas, I think it was.
There was a ship explosion there in about 1947? Was loaded with granular fertilizer, I think.
How do the two events compare for explosive energy expended ?

Wyo

Teg
09-21-2011, 07:02 PM
Halifax was estimated at 2.9 kilotons and Texas City was estimated at 2.7 kilotons so they are very close. I saw the show on the Texas City blast as well, I thought they did a pretty decent job still kind of odd to me that most folks probably don't know about either blast.

windmo
09-25-2011, 10:04 AM
Very interesting story - particularly that it happened at such a time of international and political upheaval, that it was not more widely reported. Also particularly interesting that this was just a few years after the sinking of titanic, which made worlwide headlines yet was far less devastating in terms of loss of life.

It seems that the media, in picking and choosing what news to tell us here in the US, was suspiciously selective even 100 years ago.

Teg
09-25-2011, 12:24 PM
Very interesting story - particularly that it happened at such a time of international and political upheaval, that it was not more widely reported. Also particularly interesting that this was just a few years after the sinking of titanic, which made worlwide headlines yet was far less devastating in terms of loss of life.

It seems that the media, in picking and choosing what news to tell us here in the US, was suspiciously selective even 100 years ago.

Well it was wartime when it happened, things used to be held a lot closer to the vest during time of war than they are today. :) But even after the war it didn't receive a whole lot of attention when you consider the magnitude of the loss.

Michael32170
10-14-2011, 05:29 AM
How do they know it was the largest? How does it compare to the Texas City explosion. This one knocked airplanes out of the air over a mile away.

Wyobuckaroo
10-14-2011, 09:52 AM
WAIT a minute.................................

As I was reading this with the latest replies............

Happened to remember........
Wasn't there a natural gas tanker that exploded on the Great Lakes in, like 1943 ?

I think it was Lake Michigan on the west side, if I remember.

I also suspect, even with all the damage it did, it would not be near as powerful as the other two incidents mentioned...........

Any info ?????????
Wyo

Teg
10-14-2011, 10:23 AM
How do they know it was the largest? How does it compare to the Texas City explosion. This one knocked airplanes out of the air over a mile away.

They are close, as shown a couple replies above the Nova Scotia explosion was .2 kilotons larger than Texas City, almost too close to call in that manner, but the Halifax had a higher death toll at 2,000+ (some were vaporized) so they had a hard time with a fully solid count, compared to 581 at Texas City.

As far as how they arrive at the estimates, I believe they go by blast radius and the materials that were involved in the blast to work up a formula.

Teg
10-14-2011, 10:39 AM
WAIT a minute.................................

As I was reading this with the latest replies............

Happened to remember........
Wasn't there a natural gas tanker that exploded on the Great Lakes in, like 1943 ?

I think it was Lake Michigan on the west side, if I remember.

I also suspect, even with all the damage it did, it would not be near as powerful as the other two incidents mentioned...........

Any info ?????????
Wyo

There was a big one in Cleveland during 1944, caused by a faulty tank, I don't have any blast figures but it killed about 130 people. Didn't see one for a ship, but I'll keep looking. :)

DKR
11-23-2011, 08:00 AM
N1 Launch explosion (http://en.wikipedia.org/wiki/N1_%28rocket%29) On 3 July 1969, an N1 rocket in the Soviet Union exploded on the launch pad, after a loose bolt was ingested into a fuel pump (http://en.wikipedia.org/wiki/N1_%28rocket%29#Launch_history). The entire rocket contained about 680,000 kg (680 t) of kerosene (http://en.wikipedia.org/wiki/Kerosene) and 1,780,000 kg (1,780 t) of liquid oxygen.[17] (http://en.wikipedia.org/wiki/List_of_the_largest_artificial_non-nuclear_explosions#cite_note-16) Using a standard energy release of 43 MJ/kg of kerosene (http://en.wikipedia.org/wiki/Kerosene#Properties) gives about 29 TJ for the energy of the explosion (about 6.93 kt TNT equivalent (http://en.wikipedia.org/wiki/TNT_equivalent)). Comparing explosions of initially unmixed fuels is difficult (being part detonation and part deflagration), but this may be the largest artificial non-nuclear explosion in history, based on the energy equivalent of the ingredientsOther wiki entries are listed as

tes and are not authoritative. Event Approximate yield N1 launch explosion (http://en.wikipedia.org/wiki/N1_%28rocket%29) 6-7 kt of TNT (29 TJ) Minor Scale (http://en.wikipedia.org/wiki/Minor_Scale) and Misty Picture (http://en.wikipedia.org/wiki/Misty_Picture) 4 kt of TNT (17 TJ) Heligoland (http://en.wikipedia.org/wiki/Heligoland) 3.2 kt of TNT (13 TJ) Siberian pipeline sabotage (http://en.wikipedia.org/wiki/Siberian_pipeline_sabotage) 3.0 kt of TNT (12 TJ) Halifax Explosion (http://en.wikipedia.org/wiki/Halifax_Explosion) 2.9 kt of TNT (12 TJ) Texas City Disaster (http://en.wikipedia.org/wiki/Texas_City_Disaster) 2.7-3.2 kt of TNT (11–13 TJ) Evangelos Florakis Naval Base explosion (http://en.wikipedia.org/wiki/Evangelos_Florakis_Naval_Base_explosion) 2-3.2 kt of TNT (9–13 TJ) Port Chicago disaster (http://en.wikipedia.org/wiki/Port_Chicago_disaster) 1.6-2.2 kt of TNT (7–9 TJ)
Also has some very interesting images.
(http://en.wikipedia.org/wiki/List_of_the_largest_artificial_non-nuclear_explosions#2001.E2.80.93present)

Teg
11-23-2011, 08:53 AM
Very interesting, I believe Halifax would however still hold the record for casualties, even if it were to ultimately lose out in power.

Teg
:yes4:

BDThumper
11-27-2011, 05:50 PM
The N1 Rocket was absolutely the largest in terms of explosive force. It could rival Halifax in the number of casualties as well. The true number of casualties also could not be determined as there were many scientists, technitians and reporters to view the historic launch.

Teg
11-27-2011, 09:00 PM
That was the issue at Halifax as well, it was a busy war port at the time and they never got a good number either due to the people close in to the blast being vaporized. Some big old explosions though, none that I would want to be around, from a distance I saw Daisy Cutters being used in the first Gulf War and I thought those were pretty impressive, but not so much when compared to these accidents.

Teg
:yes4:

offgridbob
11-28-2011, 04:59 PM
My ex mother-in law could almost equal that by passing gas. Man that woman was nasty