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Explosive activity at Copahue - sequence of the second explosion yesterday (Images: SERNAGEOMIN, annotation: Culture Volcan)
Saturday, Oct 11, 2014
Activity has picked up at the volcano: at least two moderately strong explosions occurred yesterday 11 Oct at 06:25 and 14:53 local time, with ash plumes rising more than 1000 m. In addition, intermittent incandescence from the crater has been visible during the night 10-11 Oct. ... [more]
Ash emissions from Copahue volcano on 6 Oct 2014 (SERNAGEOMIN)
Wednesday, Oct 08, 2014
A new phase of ash emissions began on the evening of 4 Oct. The volcano started to emit near continuous ash plumes, interrupted by strong degassing phases, from the active El Agrio crater. Seismic activity according to SERNAGEOMIN has been low suggesting that the origin of the new eruptions is phreatic, i.e. driven by steam explosions rather than fresh magma rising to the surface. ... [more]

Copahue volcano

stratovolcano 2997 m / 9,833 ft
Chile/Argentina, -37.85°S / -71.17°W
Current status: erupting (4 out of 5)
Copahue webcams / live data
Copahue volcano videos
Last update: 11 Oct 2014
Typical eruption style: explosive
Copahue volcano eruptions: 2014, 2013, 2012, 2001(?), 2000, 1992, 1961, 1937, 1867(?), 1759(?), 1750 No recent earthquakes
TimeMag. / DepthDistanceLocation
Copahue volcano is an active stratovolcano in central Chile at the border with Argentina. The volcano has a 6.5 x 8.5 km wide caldera with several craters aligned on a 2 km ENE-WSW trending zone.
The eastern summit crater has an acid 300 m wide crater lake known as El Agrio or Del Agrio which has intense hydrothermal activity.
Infrequent mild-to-moderate explosive eruptions occurred in historic time. Eruptions in the last century have ejected pyroclastic rocks and chilled liquid sulfur fragments. The last one was in 2000.

Background:

Volcán Copahue is an elongated composite cone constructed along the Chile-Argentina border within the 6.5 x 8.5 km wide Trapa-Trapa caldera that formed between 0.6 and 0.4 million years ago near the NW margin of the 20 x 15 km Pliocene Caviahue (Del Agrio) caldera. and displays intense fumarolic activity. Acidic hot springs occur below the eastern outlet of the crater lake, contributing to the acidity of the Río Agrio, and another geothermal zone is located within Caviahue caldera about 7 km NE of the summit.
(Smithsonian / GVP volcano information)


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