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Volcanoes of southern Colombia: overflights, 15 February 2010 22 February 2010

Posted by admin in activity reports, Azufral, Cerro Negro (Colombia), Colombia, Cumbal, Galeras, volcano monitoring.
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Galeras volcano, 15 February 2010 (INGEOMINAS)
The summit of Galeras (image from 15 February 2010 INGEOMINAS overflight).

The INGEOMINAS volcanological observatory at Pasto has images from overflights carried out on 15 February 2010 over the volcanoes of southern Colombia: Galeras, Cumbal, Azufral and the Chiles-Cerro Negro complex (click on the name to access the images for each volcano).

Of these four, only Galeras is currently showing any signs of restlessness and is on alert level III, yellow (‘changes in the behaviour of the volcanic activity’). Cumbal and Azufral are both at alert level IV, green (‘volcano active and behaviour stable’), while Cerro Negro isn’t considered to need an alert level. Cumbal’s most recent eruptive activity was an explosive eruption in 1926, Azufral’s last known eruption was 1000 years ago, while Cerro Negro may have erupted in 1936, although this is unconfirmed.

Cerro Negro volcano, 15 February 2010 (INGEOMINAS)
Cerro Negro (image from 15 February 2010 INGEOMINAS overflight).

Cumbal volcano, 15 February 2010 (INGEOMINAS)
Summit of Cumbal volcano (image from 15 February 2010 INGEOMINAS overflight).

Azufral volcano, 15 February 2010 (INGEOMINAS)
Azufral volcano, showing Laguna Verde crater lake (image from 15 February 2010 INGEOMINAS overflight).

Global Volcanism Program: Azufral – information for Azufral (1501-09=)
Global Volcanism Program: Cerro Negro de Mayasquer – information for Cerro Negro de Mayasquer (1501-11=)
Global Volcanism Program: Cumbal – information for Cumbal (1501-10=)
Global Volcanism Program: Galeras – information for Galeras (1501-08=)

The Volcanism Blog


1. Passerby - 23 February 2010

Speaking of restless, we have a difuse SO2 signal coming from the area of Sarychev Peak, consistent with a series of mild earthquakes in the same vicinity.

2. Irotama - 14 April 2010

Eruptive activity at Chaiten volcano in Chile was stable on 27th February. An eruption column rose to a height of less than 2 km. During the day there were minor collapses of the spine of the dome. The collapse events led to an increase in ash content of the plume. Small dome collapses were observed at at 17:39 hr, 18:44, 18:59 and 19:35, which was the largest. Eruption columns are irregular and periodic, and are composed of gas, ash, and water vapour. There have been no changes in seismic activity at Chaiten volcano. Two earthquakes were reported on 26th February – magnitude 3.2 at a depth of 15.1 km, and magnitude 3.3 at depth of 14.4 km. The volcanic alert level for Chaiten volcano remains ar RED, due to the possibility of further ash eruptions, dome collapse, pyroclastic flows, and lahars: Irotama Colombia

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