Nevado del Ruiz


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Nevado del Ruiz,

volcano, 17,457 ft (5,321 m) high, in the Cordillera Central of the N Andes, E Colombia, on the Caldas-Tolima dept. border. A broad, glacier-covered stratovolcano, it can produce explosive eruptions with pyroclastic flowspyroclastic flow,
turbulent, fluidized mixture of rock, volcanic ash, and hot gas that moves like an avalanche away from a volcanic eruption. A pyroclastic flow may contain a mix of rock fragments ranging up to the size of boulders, with the heavier fragments moving along closer
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, and the melting of glaciers by those hot gases has resulted in devastating lahars (fast-moving mud and debris flows) during its eruptions, most recently in Nov., 1985, when a lahar buried or washed away Armero, a town 46 mi (74 km) away. The 1985 eruption, in which some 23,000 died, was one of the deadliest volcanic disasters of the 20th cent.
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President Juan Manuel Santos said on his Twitter account that the area around the Nevado del Ruiz, in the central spine of Colombia's Andean mountain range, had been put on red alert and people should leave the area.
2) Armero was a town that suffered dearly after the 1985 eruption of the Nevado del Ruiz volcano, which caused mudflows killing twenty-three thousand people.
The Nevado del Ruiz Volcano (NRV) is located in the northernmost end of the NVZ and is part of the previously-named Ruiz-Tolima volcanic complex (Herd, 1982) (Figure 5).
Nevado del Ruiz had not erupted for nearly 150 years.
Predictably, the result was a horrific eruption of Nevado del Ruiz in 1985 that set off a mudslide that killed 23,000 people.
In 1985, the hot ash of the Nevado del Ruiz volcano in Colombia, South America, melted part of the mountain's ice cap.
The author would like to thank the colleagues at INGEOMINAS, the Volcanological and Seismological Observatory of Nevado del Ruiz Volcano, Manizales, Colombia, especially Alvaro P.
4 In Colombia, the Nevado del Ruiz volcano erupted, killing 20,000 people.
That includes the 1970 earthquake in Peru that took 66,000 lives, the 1985 eruption of the Nevado del Ruiz volcano in Colombia that left 22,000 people dead and floods that killed as many as 50,000 in Venezuela in 1999.
Nevado del Ruiz in Colombia melted glaciers atop the mountain and created massive mudflows; 23,000 people died.
The Colombian volcano Nevado del Ruiz erupted two Sundays in a row in late July.
The Nevado del Ruiz Volcano is monitored by the Volcanological and Seismological Observatory at Manizales (VSOM).