Today in History: The Great Halifax Explosion

IN 1917, At 9:05 a.m., in the harbor of Halifax in the Canadian province of Nova Scotia, the most devastating manmade explosion in the pre-atomic age occurs when the Mont Blanc, a French munitions ship, explodes 20 minutes after colliding with another vessel.

On the morning of December 6, the Norwegian vessel Imo left the Halifax harbor for New York City. At the same time, the French freighter Mont Blanc, its cargo hold packed with highly explosive munitions–2,300 tons of picric acid, 200 tons of TNT, 35 tons of high-octane gasoline, and 10 tons of gun cotton–was forging through the harbor’s narrows to join a military convoy that would escort it across the Atlantic.

At approximately 8:45 a.m., the two ships collided, setting the picric acid ablaze. The Mont Blanc was propelled toward the shore by its collision with the Imo, and the crew rapidly abandoned the ship, attempting without success to alert the harbor of the peril of the burning ship.

The massive explosion killed more than 1,800 people, injured another 9,000–including blinding 200–and destroyed almost the entire north end of the city of Halifax, including more than 1,600 homes.

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