We are currently having technical problems with the volcano profiles, Weekly Reports, and Current Eruptions pages, but expect to have them restored on 24 May. Sorry for the inconvenience.
Logo link to homepage

Report on Nevado del Ruiz (Colombia) — 16 March-22 March 2016


Nevado del Ruiz

Smithsonian Institution / US Geological Survey
Weekly Volcanic Activity Report, 16 March-22 March 2016
Managing Editor: Sally Sennert.

Please cite this report as:

Global Volcanism Program, 2016. Report on Nevado del Ruiz (Colombia) (Sennert, S, ed.). Weekly Volcanic Activity Report, 16 March-22 March 2016. Smithsonian Institution and US Geological Survey.

Weekly Report (16 March-22 March 2016)

Nevado del Ruiz

Colombia

4.892°N, 75.324°W; summit elev. 5279 m

All times are local (unless otherwise noted)


Servicio Geológico Colombiano’s (SGC) Observatorio Vulcanológico y Sismológico de Manizales reported that at 0606 on 18 March an episode of volcanic tremor was associated with an ash emission that rose 1.7 km above Nevado del Ruiz. The Alert Level remained at III (Yellow; "changes in the behavior of volcanic activity").

Geological Summary. Nevado del Ruiz is a broad, glacier-covered volcano in central Colombia that covers more than 200 km2. Three major edifices, composed of andesitic and dacitic lavas and andesitic pyroclastics, have been constructed since the beginning of the Pleistocene. The modern cone consists of a broad cluster of lava domes built within the caldera of an older edifice. The 1-km-wide, 240-m-deep Arenas crater occupies the summit. The prominent La Olleta pyroclastic cone located on the SW flank may also have been active in historical time. Steep headwalls of massive landslides cut the flanks. Melting of its summit icecap during historical eruptions, which date back to the 16th century, has resulted in devastating lahars, including one in 1985 that was South America's deadliest eruption.

Source: Servicio Geológico Colombiano (SGC)