What destroyed the city of St.Pierre, Martinique in 1902?

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A nuée ardente, or pyroclastic flow, destroyed the city of St. Pierre in Martinique in 1902. This deadly volcanic phenomenon is a fast-moving cloud of hot gas, ash, and rocks that can reach temperatures of over 1,000 degrees Celsius and speeds of up to 700 km/h. The eruption of Mount Pelée caused a massive nuée ardente that engulfed the city, killing almost all of its 30,000 inhabitants within minutes.

What Destroyed the City of St