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One of the deadliest parts of a volcanic eruption, a pyroclastic flow is a gigantic current of gases and bits of rock that surges downhill at speeds of up to 450 mph (724 km/h) and temperatures of about 1,800° F (1,000° C). These deadly flows can cross water bodies and have the potential to generate tsunamis. During the 1902 eruption of Martinique’s Mount Pelée, a pyroclastic flow destroyed the entire city of Saint-Pierre, killing some 28,000. What other city was famously destroyed in this way? Discuss
Source: The Free Dictionary