Volcano news: Colima Volcano (Mexico)
Colima volcano (Mexico): intensity of eruption decreases, frequent small explosions
Tuesday Oct 18, 2016 09:00 AM | BY: T
Small explosion at Colima this morning
Activity at the volcano continues but its intensity has decreased over the past week. Lava effusion into the viscous lava flow on the southern side continues (if at all) at very low rate, manifesting itself by occasional rockfalls from the thick lava flow front.
The lava flow front of Colima's recent lava flow (image: University of Colima)
Explosions of small to moderate size at the summit vent are relatively frequent, probably destroying the recently emplaced dome.
Members of Colima University recently sampled the lava flow in order to investigate its chemical properties which might give a clue to explain the recent effusive phase of the volcano which came very suddenly and was very fast. In particular, it would be interesting to see if the new lava is different from the lavas of July last year or if it also is relatively rich in dissolved water (that help explain the fast rise of the magma column).
Tuesday, Oct 18, 2016
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Sunday, Oct 16, 2016
Saturday, Oct 15, 2016
Background:Colima volcano is one of the most active in North America and one of the potentially most dangerous ones. It has had more than 30 periods of eruptions since 1585, including several significant eruptions in the late 1990s. Scientific monitoring of the volcano began 20 years ago.
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 probable 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.
Source: GVP, Smithsonian Institute - Colima information