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Copahue volcano

Updated: Mar 5, 2024 01:53 GMT -
stratovolcano 2997 m / 9,833 ft
Chile/Argentina, -37.85°S / -71.17°W
Current status: normal or dormant (1 out of 5)
Last update: 30 Jan 2023 (Smithsonian / USGS Weekly Volcanic Activity Report)

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.

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Typical eruption style: explosive
Copahue volcano eruptions: 2015-16, 2014, 2013, 2012, 2001(?), 2000, 1992, 1961, 1937, 1867(?), 1759(?), 1750

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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)


See also: Sentinel hub | Landsat 8 | NASA FIRMS
Wed, 23 Nov 2022, 15:00

Copahue volcano (Central Chile-Argentina) - Smithsonian / USGS Weekly Volcanic Activity Report for 16 November-22 November 2022 (New Activity / Unrest)

Based on information from Observatorio Argentino de Vigilancia Volcánica (OAVV), SERNAGEOMIN and SEGEMAR reported a minor increase of activity at Copahue. RSAM values based on volcanic tremor began to increase on 13 November. Weather conditions prevented views of the volcano during 13-14 November. ... Read all
Sat, 19 Nov 2022, 13:18

Copahue volcano (Chile/Argentina): emissions have been interrupted

Gas and steam emissions from Copahue volcano on 16 November (image: @valecaviahue/twitter)
After the new eruptive phase that began on 16 November, the activity seems to have slightly decreased over the past two days. ... Read all