Physical setting and geologic history site location the nevado del ruiz volcano, one of the highest peaks in the central cordillera of colombia, is located approximately 120 km west of bogota (4°50-55' n, 75°16-20'w. About 20,000 people are feared dead after a volcanic eruption in northern colombia four towns in the andes region are reported to have been buried when ash spewed out of the volcano, nevado del ruiz, causing a mudslide. The fatal eruption happened during the night when most of the town's 27,000 residents were in bed nevado del ruiz, known locally as the sleeping lion, had not erupted for nearly 150 years increased activity even though it is located only 310 miles (500 km) from the equator, the volcano's summit is covered with snow.
The eruption of nevado del ruiz volcano colombia, south america, november 13, 1985 washington, dc: the national academies press doi: 1017226/1784 appendix a geologic setting and prehistoric volcanic activities 91–96. Teachers guide to stratovolcanoes of the world eruption feature: nevado del ruiz, colombia: facts | story | feature | questions: lahars lahars are debris flows and/or mud flows produced by loose soil and rock flowing down the sides of a volcanothe name comes from the indonesian term where lahars are common volcanic hazards.
The eruption of nevado del ruiz volcano colombia, south america november 13, 1985 prepared by: dennis s mileti (team leader), department of sociology, colorado state university, fort collins. The armero tragedy (spanish: tragedia de armero [tɾaˈxeðja ðe aɾˈmeɾo]) was one of the major consequences of the eruption of the nevado del ruiz stratovolcano in tolima, colombia, on november 13, 1985 after 69 years of dormancy, the volcano's eruption caught nearby towns unaware, even though the government had received warnings from multiple volcanological organizations to evacuate the area after the detection of volcanic activity two months earlier.
Nevado del ruiz erupted on 13 november 1985 although the eruption was small, it caused a large mud flow which swept through the town of armero almost 40 km away from the summit where more than 23,000 people were killed. Nevado del ruiz, the highest active volcano in the andes mountains of colombia, suffers a mild eruption that generates a series of lava flows and surges over the volcano's broad ice-covered summit.
What volcanic hazard from nevado del ruiz was responsible for the loss of life in the village of armero a lahar there had been no recent volcanic or seismic activity on nevado del ruiz in the months prior to the deadly november 13, 1985 eruption. Nevado del ruiz volcano has erupted 23 times during the past two million years geologic location: nevado del ruiz is located on the border between the provinces of caldas and tolima in colombia, part of the andes mountain range, overshadowed the town of armero, part of los nevados national park natural, 129 km west of the capital bogota.
A review of the recorded activity of the nevado del ruiz volcano indicates the occurrence of two major historic events: the volcanic eruption of march 12, 1595, and the lahar flows of february 19, 1845. Nevado del ruiz volcano in central colombia, 130 km wnw of bogota, is a broad, glacier covered volcano a relatively small eruption in 1985 caused a devastating mud flow that killed almost 25,000 people in the town of armero, marking one of the worst volcanic disasters in history. Omayra sánchez garzón (august 28, 1972 – november 16, 1985) was a 13 year old colombian girl killed in armero, tolima, by the 1985 eruption of the nevado del ruiz volcano volcanic debris mixed with ice to form massive lahars (volcanically induced mudslides, landslides, and debris flows) that rushed into the river valleys below the mountain, killing nearly 23,000 people and destroying.
In april 2008, the nevado del huila volcano erupted, and thousands were evacuated volcanologists were worried that this could be another nevado del ruiz hundreds of these eruptions have had huge evacuation numbers for similar reasons survivors who fled to other towns in the area were gradually housed in new government schemes.
The first eruptions of nevado del ruiz occurred about 18 million years ago at the beginning of the pleistocene epoch three primary eruption periods in the history of the massif have been identified: ancestral, older and present.