Pyroclastic Flow facts

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When Vesuvius erupted in 79 AD, some people hid in Herculaneum's boathouses for shelter. When pyroclastic flows reached them, they were hit with a heatwave so intense that it instantly boiled and vaporized their brains, making their skulls explode

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In 1902 the town Saint Pierre was wiped out by a pyroclastic flow. Only 2 of the town's 28,000 residents survived.

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1. Harry R. Truman, a Washington resident who lived on Mount St. Helens came to be a folk hero in the months preceding the volcano’s 1980 eruption after he stubbornly refused to leave his home. Truman expectedly died by the pyroclastic flow that buried the site under 150 feet of volcanic debris.

2. Plymouth, the former capital of the Caribbean British territory Montserrat, was completely destroyed by a volcano eruption and the subsequent pyroclastic flow. In 1997.

3. Volcanologist Harry Glicken should have died during the eruption of Mount St. Helens. He later died in 1991 from a pyroclastic flow on Mount Unzen.

4. In 1991, Maurice Krafft died in a massive pyroclastic flow, a day after he told the media "I have seen so much eruptions in 23 years, that even if I die tomorrow, I don't care."

5. A man named Harry S. Truman died today in 1980, when a 150 foot high pyroclastic flow from Mt. St. Helens buried his house. He refused to heed warnings and leave his home.

6. The pyroclastic flow (the current of hot gas and rock produced by a volcanic eruption) produced by the 1980 Mount St. Helens eruption traveled down the mountain at a speed of 670 miles per hour and may have broken the sound barrier.

7. A shoemaker in Saint-Pierre narrowly survived three volcanic eruptions and pyroclastic flows in one year, including the 1902 Mount Pelee eruption that killed all but two of the 30,000 inhabitants and leveled the town.