One of the most tragic volcanic events of the 20th century occurred in Colombia, in 1985, when an eruption of Nevado del Ruiz produced lahars that swept down river valleys and destroyed communities in its path. With little warning, the volcano began erupting on the afternoon of November 13, 1985. Ash and muddy rain began to fall. Communities were alerted but no formal decision was made to evacuate. Later that evening, a stronger eruption produced pyroclastic flows and surges that mixed with snow
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LAHAR FLOW FROM KANLAON VOLCANO AT LA CASTELLANA, NEGROS OCCIDENTAL 🌋 Lahar flow hits Tamburong Creek, Brgy. Biaknabato, La Castellana, Negros Occidental today, June 05, 2024 after it was triggered by heavy rains brought by localized thunderstorms from Kanlaon Volcano. A lahar flow is a fast-moving volcanic mudflow made of water, ash, and rocks. In a tropical climate, they happen when heavy rainfall mixes with volcanic ash and debris. The rainwater saturates the ash, creating a dense slurry tha
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Do you know what a lahar is? How about the risks involved with a lahar? (Spoiler: A Lahar is an Indonesian word describing a mudflow or debris flow that originates on the slopes of a volcano.) May is volcano awareness month and we want to help you understand these terms when you might hear them. | Washington Emergency Management Division
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