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Tuesday, Nov 28, 2017
Buenos Aires VAAC reported small steam plumes with possibly minor ash content during 21 and 24-27 November, drifting E and NE. The plumes rose to altitudes of 3.3-3.6 km (11,000-12,000 ft) a.s.l. during 25-26 November. [more]
Monday, Nov 27, 2017
Volcanic Ash Advisory Center Buenos Aires (VAAC) issued the following report: ... [more]
 

Copahue volcano

stratovolcano 2997 m / 9,833 ft
Chile/Argentina, -37.85°S / -71.17°W
Current status: minor activity or eruption warning (3 out of 5)
Copahue webcams / live data | Reports
Copahue volcano videos
Copahue volcano books
Last update: 28 Nov 2017
Typical eruption style: explosive
Copahue volcano eruptions: 2015-16, 2014, 2013, 2012, 2001(?), 2000, 1992, 1961, 1937, 1867(?), 1759(?), 1750
TimeMag. / DepthDistanceLocation
Thu, 15 Mar
Thu, 15 Mar 05:59 UTCM 3.2 / 130.9 km15 km31 km al E de Ralco
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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