Volcano news: Colima Volcano (Mexico)
During 22-27 September, several small explosions occurred at Colima. The largest explosion took place on 27 September at 0507 and produced a plume to a height of ~3.8 km above the volcano (or 25,100 ft a.s.l.). The plume drifted WSW, depositing small amounts of ash in the cities of Colima, Villa de Álvarez, and Comala more than 30 km from the volcano. Due to the threat of lahars forming on the volcano's flanks, Universidad de Colima advised avoiding the ravines of La Lumbre, San Antonio, Monte Grande (in Colima state), and La Arena (in Jalisco state)....more
Colima continues to be at moderately high levels of activity. A strong explosion occurred yesterday on Sept. 16, at 10:46 am local time, producing an ash plume about 5 km high (3 miles). The eruption was accompanied by loud detonations that could be heard in villages up to 15 km away from the volcano. Ash-fall occurred in villages and towns to the northeast of Colima.
Colima remains active, although the intensity has decreased during the past weeks. Typically, 3-5 minor to medium ash explosions are occurring per day at the volcano and an intensification of the eruption could occur at any time.
Colima's Volcano of Fire had a spectacular, predawn explosion Wednesday 27 of July, shooting incandescent rock, ash and steam nearly 9,000 feet into the air over western Mexico. The eruption sent ash raining down on nearby communities, but officials had no reports of major damage.
The eruption at Colima seems to be decreasing in intensity. During the last week, only weaker explosions, typically 2-3 per day, have been taking place at Colima. However, lahars are remobilizing large amounts of the recent ash deposits and frequently decend ravines especially on the S and E flank of Colima.
On the 5th of July, a new strong explosion took place at Colima volcano (Mexico), producing an ash plume of about 5 km height (3 miles).
On 30 June, 3 lahars caused by mobilized ash deposits descended Barranca La Lumbre and Barranca Montegrande to distances of 10km and 7-8km. No damages to inhabited areas occurred.
The Mexican Civil Defense informed that during last 24 hours two ash eruptions have been registered as well as lahars without damages to the populations bordering to the volcano .
On slopes of the volcano a great amount of demolished trees was observed generated by the piroclastic flows, which increases the risk of pyroclastic avalanches in any future volcanic activity.
During the past week, several ash explosions have taken place, sending plumes to heights of up to 5,500 m a.s.l., drifting N and NW.
Since the powerful explosion on June 9, that destroyed the lava dome in the summit crater of Colima, no further events of that scale, only light and less frequent emissions of ash have occurred.
During the past few days, Colima volcano has quieted down a bit after the dramatic series of powerful explosions between March 13 and June 9 2005, which culminated in the destructino of the lava dome. During the past days, only relatively weak steam and ash emission have taken place at Colima and the (few) people that had been evacuated on June 6 returned to their homes.
On June 10 at 02:34 and 07:13 (local time) two small exhalations were registered. The explosion of June 9 destoyed the lava dome in the top partially. An ash cloud traveled towards the South at an approximated speed of 55 km/h. Ash fell over some settlements near the volcano. The authorities said that the amount of ash emitted, until the moment, does not put in risk the health of the population.
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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