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Random pictures
Friday, May 30, 2014
Seismic unrest continues at the volcano, still on alert status Yellow, with little variation over the past months. The Pasto volcano observatory reported a 50% increase in earthquakes during the past week. ... [more]
Wednesday, Jan 22, 2014
Seismic unrest at weak energy levels continues. 5 small earthquake swarms were recorded over the past week, the most prominent having 213 events up to a maximum of magnitude 1.9 during 5 hours on 19 Jan. Most quakes are associated with rock fracturing at shallow depths (3 km) beneath the La Plazuela crater. Pasto reports no unusual surface activity at the volcano. [more]

Cumbal volcano

stratovolcano 4764 m / 15,630 feet
Colombia, 0.95°N / -77.87°W
Current status: restless (2 out of 5)
Cumbal webcams / live data
Cumbal volcano books
Last update: 30 May 2014
Typical eruption style: effusive, mildly explosive
Cumbal volcano eruptions: 1926, 1877
TimeMag. / DepthDistanceLocation
Tue, 28 Feb
Tue, 28 Feb 01:52 UTCM 3.5 / 8 km23 km COLOMBIA-ECUADOR BORDER REGION
Cumbal volcano is an active glacier-capped stratovolcano in SW Colombia, located 25 km SW of Azufral volcano and 5.5 km NE of the town of Cumbal - Pueblo.
Cumbal is the southernmost active volcano of Colombia that has erupted in historic times.
A young lava dome occupies the 250-m-wide summit crater, and eruptions from the upper east flank produced a 6-km-long lava field. Thermal springs occur on the SE flanks.

Background:

Cumbal volcano is elongated in a NE-SW direction and composed primarily of andesitic-dacitic lava flows, including many geologically young ones. Over time, the active vents seem to have migrated SW-wards:
The 2 active craters, the main crater on the NE side and Mundo Nuevo crater on the SW side have active fumaroles and sulphur deposits and built the summit ridge, while the oldest vents are located NNE of Cumbal and Mundo Nuevo craters.

1988 volcanic unrest
Seismic unrest and an increase in fumarolic activity occurred in 1988, simultaneously with nearby Galeras volcano.

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