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A lahar travels down a river valley in Guatemala near the Santa Maria volcano, 1989. A lahar (/ ˈ l ɑː h ɑːr /, from Javanese: ꦮ꧀ꦭꦲꦂ) is a violent type of mudflow or debris flow composed of a slurry of pyroclastic material, rocky debris and water.
A lahar is a debris flow related in some way to volcanic activity, either directly as a result of an eruption, or indirectly by the collapse of loose material on the flanks of a volcano. A variety of phenomena may trigger a lahar, including melting of glacial ice, sector collapse , intense rainfall on loose pyroclastic material, or the outburst ...
Detailed map of Mount Rainier's summit and northeast slope showing upper perimeter of Osceola collapse amphitheater (hachured line) The Osceola Mudflow, also known as the Osceola Lahar, was a debris flow and lahar in the U.S. state of Washington that descended from the summit and northeast slope of Mount Rainier, a volcano in the Cascade Range during a period of eruptions about 5,600 years ago.
Lahar can refer to Lahar, a kind of volcanic mudflow; Lahar (god), a Sumerian god; Lahar, India, a town in Madhya Pradesh, India ... additional terms may apply.
A lahar is a volcanic mudflow or landslide. The 1953 Tangiwai disaster was caused by a lahar, as was the 1985 Armero tragedy in which the town of Armero was buried and an estimated 23,000 people were killed. [citation needed] Volcanoes rated at 8 (the highest level) on the volcanic explosivity index are known as supervolcanoes.
The Trout Lake Mudflow was a lahar in the U.S. state of Washington that descended from Mount Adams about 6,000 years ago. [1] It was the largest lahar at Mount Adams since the end of the last ice age, having emplaced about 66,000,000 m 3 (2.3 × 10 9 cu ft) of mud and rock in a deposit covering more than 16 km 2 (6.2 sq mi) of the White Salmon ...
The cost to agriculture of eruption effects was estimated to be 1.5 billion pesos. Many farmers near Pinatubo began growing quick-ripening crops such as peanuts, cassava, and sweet potatoes, which could be harvested before the threat of lahar floods during the late summer rainy season. [21]
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