Report on Colima (Mexico) — 12 January-18 January 2011
Smithsonian / US Geological Survey Weekly Volcanic Activity Report, 12 January-18 January 2011
Managing Editor: Sally Kuhn Sennert
Please cite this report as:
Global Volcanism Program, 2011. Report on Colima (Mexico). In: Sennert, S K (ed.), Weekly Volcanic Activity Report, 12 January-18 January 2011. Smithsonian Institution and US Geological Survey.
19.514°N, 103.62°W; summit elev. 3850 m
All times are local (unless otherwise noted)
According to news articles from 11 and 12 January, although incandescent landslides from Colima's lava dome had increased during the last days of 2010 into early 2011, the activity was still considered to be within normal parameters. Landslides occurred on the W, S, and N flanks, producing "dust plumes" observed from multiple municipalities. The lava dome that began growing in February 2007 was about 60 m high and had a volume of 2.6 million cubic meters.
Geologic Background. The Colima volcanic complex is the most prominent volcanic center of the western Mexican Volcanic Belt. It consists of two southward-younging volcanoes, Nevado de Colima (the 4320 m high point of the complex) on the north and the 3850-m-high historically active Volcán de Colima at the south. A group of cinder cones of late-Pleistocene age is located on the floor of the Colima graben west and east of the Colima complex. Volcán de Colima (also known as Volcán Fuego) is a youthful stratovolcano constructed within a 5-km-wide caldera, breached to the south, that has been the source of large debris avalanches. Major slope failures have occurred repeatedly from both the Nevado and Colima cones, and have produced a thick apron of debris-avalanche deposits on three sides of the complex. Frequent historical eruptions date back to the 16th century. Occasional major explosive eruptions (most recently in 1913) have destroyed the summit and left a deep, steep-sided crater that was slowly refilled and then overtopped by lava dome growth.