Active volcanoes / Aktive vulkaner:
Callaqui, Chile

The ice-capped, 3164-m-high Callaqui volcano has an elongated profile due to construction along an 11-km-long,
SW-NE-trending fissure. As many as 16 well-preserved volcanic craters, the majority of which are on the SW flank,
have erupted along this fissure and produced lava flows that mantle the volcano's flanks.
Two large, ice-filled craters are located at the summit, and intense solfataric activity occurs on the southern side.

Photo by Oscar González-Ferrán (University of Chile).

The late-Pleistocene to Holocene Callaqui stratovolcano has a profile of an overturned canoe due to its construction
along an 11-km-long, SW-NE fissure above a 1.2-0.3 million year old Pleistocene edifice.

The ice-capped, 3164-m-high basaltic-andesite Callaqui volcano contains well-preserved volcanic cones and lava flows, which have traveled up to 14 km. Small craters 100-500 m in diameter are primarily found along a fissure extending
down the SW flank. Intense solfataric activity occurs at the southern part of the summit; in 1966 and 1978,
red glow was observed in fumarolic areas.

Periods of intense fumarolic activity have dominated at Callaqui, and few historical eruptions are known.
An explosive eruption was reported in 1751, there were uncertain accounts of eruptions in 1864 and 1937,
and a small phreatic ash emission was noted in 1980.

Friday, January 6th, 2012.

Based on a pilot observation, the Buenos Aires VAAC reported that the top of an ash plume from Callaqui was at
3 km (10,000 ft) a.s.l. on 2 January. Ash was not detected in satellite imagery under clear skies.



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