Volcano news: Colima Volcano (Mexico)
Colima, Mexico: Explosive activity replaces effusive lava flows and domes
Samstag Feb 28, 2015 22:02 | IS
Starry sky and large explosive eruption of Colima, photograph by Hernando Rivera.
Nighttime explosive activity of Colima, photograph by Hernando Rivera.
Dr Tom Pfeiffer is part of a volcano filming expedition in Mexico at the moment. They have been observing Colima volcano over the past few days.
Daytime view onto the tall ash plume above Colima, photograph taken by Michale Dalton-Smith
The effusive activity seems to have stopped since there is no more dome building nor lava flows. Explosive activity has taken over instead: Colima erupts in irregular explosions (at intervals of 30mins to 7 hours) of small to moderately large size, emitted from two different vents in summit crater. Ash plumes are rising to max 2-3km and bombs thrown into the air are estimated to travel up to 800m high and land laterally up to 1.5 km away from the vent. Such large eruptions can furthermore last up to 2 minutes.
Links / Quelle:
Links / Quelle:
- Hernando Rivera: Facebook page of the photographer with info on this expedition
- Michael Dalton-Smith: Facebook page of the photographer with info on this expedition
Donnerstag, Feb 19, 2015
The volcano remains active with explosions from the summit crater, but its activity has been decreasing a bit. In a report by the Civil Protection, the lava dome is said to have been partially destroyed by the recent explosions, leaving a crater of about 140 m diameter. [mehr]
Dienstag, Feb 17, 2015
Explosive activity remains elevated. At intervals of tens of minutes to few hours, small to moderate vulcanian explosions occur, often producing ash plumes rising 1-2 km above the crater. [mehr]
Dienstag, Feb 10, 2015
A small vulcanian-type explosion this morning produced a beautiful, vertical ash column rising approx. 2 km (no wind). [mehr]
Donnerstag, Feb 05, 2015
After being a bit lower during the past week, activity has picked up again today. The volcano had a series of small to moderate explosions ejecting ash plumes reaching up to 2-3 km above the crater: ... [mehr]
Samstag, Jan 24, 2015
Eruptive activity continues at moderate levels with effusion of viscous lava at the summit, producing frequent smaller and sometimes larger rockfalls and avalanches. Small to moderate explosions occur a few times per day: ... [mehr]
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