Report on Callaqui (Chile) — March 1990
Bulletin of the Global Volcanism Network, vol. 15, no. 3 (March 1990)
Managing Editor: Lindsay McClelland.
Callaqui (Chile) Steam jetting from fumaroles
Please cite this report as:
Global Volcanism Program, 1990. Report on Callaqui (Chile). In: McClelland, L (ed.), Bulletin of the Global Volcanism Network, 15:3. Smithsonian Institution. https://dx.doi.org/10.5479/si.GVP.BGVN199003-357091.
37.92°S, 71.45°W; summit elev. 3164 m
All times are local (unless otherwise noted)
Steam jets from that rose 300-400 m from fumaroles on the SE flank, 200 m below the summit, were observed during dry weather at about noon on 9 and 16 March.
Geologic Background. 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, basaltic-andesite volcano contains well-preserved 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 portion of the summit; in 1966 and 1978, red glow was observed in fumarolic areas (Moreno 1985, pers. comm.). Periods of intense fumarolic activity have dominated; 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.
Information Contacts: J. Naranjo, SERNAGEOMIN, Santiago; H. Moreno, Univ de Chile.