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Random pictures
In this photo released by the civil defense unit of the state government of Jalisco, the eruption plume from the initial stage of the powerful vulcanian explosion at Colima volcano on May 23, 2005, has been captured on film. The collapsing eruption column loaded with ash and rock fragments has not yet fully developed, but the flanks of the volcano are already covered by the impacts of ballistics. (AP Photo/Proteccion Civil del estado de Jalisco-HO)
In this photo released by the civil defense unit of the state government of Jalisco, the eruption plume from the initial stage of the powerful vulcanian explosion at Colima volcano on May 23, 2005, has been captured on film. The collapsing eruption column loaded with ash and rock fragments has not yet fully developed, but the flanks of the volcano are already covered by the impacts of ballistics. (AP Photo/Proteccion Civil del estado de Jalisco-HO)


Colima volcano
Stratovolcano 3850 m / 12,631 ft
Western Mexico, 19.51°N / -103.62°W
Current status: restless (2 out of 5)
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Colima volcano eruptions:
1519, 1560, 1576, 1585, 1590, 1602(?), 1606, 1611-1613, 1622, 1690, 1711, 1743(?), 1744, 1749(?),1769, 1770, 1771, 1780, 1794, 1795, 1804, 1806-1809, 1818, 1819, 1866, 1869, 1870-71, 1872-73, 1874, 1875-78, 1879-80, 1880-81, 1882-84, 1885-1886, 1887, 1889-90, 1890, 1891-92, 1893-1902, 1903, 1904-1906, 1908-09, 1913, 1926-1931(?), 1941(?), 1957-1960, 1961-62, 1963-70, 1973(?), 1975-76, 1977-1982, 1983(?), 1985-86, 1987, 1988(?), 1991, 1994, 1997-2011, 2013-ongoing
Typical eruption style:
Dominantly explosive. Construction of lava domes, vulcanian eruptions and strombolian activity. In near-constant activity since 1994.
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Volcano news: Colima Volcano (Mexico)

Colima volcano (Mexico) activity update: Alert level raised to YELLOW due to increasing seismicity

Friday Apr 26, 2019 12:05 PM | BY: LEO

Colima volcano with the summit crater showing degassing (Picture by Vincent Verwater: @CIIV facebook page)
Colima volcano with the summit crater showing degassing (Picture by Vincent Verwater: @CIIV facebook page)
Alert color codes for Colima (Image: Colima Government)
Alert color codes for Colima (Image: Colima Government)
After over a year of low activity the volcanic alert level at the Colima volcano has been raised from green (base activity) to yellow (low activity) in response to a recent increase in seismic activity.
As part of monitoring the Colima volcano the federal and state civil protection and the University of Colima agreed the increase in seismicity was significant enough to increase volcanic alert levels. The exclusion zone surrounding the volcano has been extended to 8 kilometers
Two probable scenarios have been proposed involving effusive or explosive activity. First, a moderate explosion accompanied by dome growth within the crater. The second, dome growth within the crater and subsequent lava flows over the crater rim.
Nearby population centres continue business as normal. It is recommended that residents respect the exclusion zone and are aware of evacuation procedures.
The yellow volcanic
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Links / Sources:
  • CP Colima: Press release from Civil Protection Colima
Previous news
Summit crater of Colima volcano seen from the east on 9 Nov 2017
Friday, Nov 10, 2017
The volcano has been calm (at least at the surface) during the past months. Only a weak gas and steam plume is rising from the summit crater left after the explosive eruptions in January this year. ... [more]
Seismic signal from Colima on 25 Aug 2017 (image: University of Colima)
Saturday, Aug 26, 2017
There are signs that the volcano might be entering a new eruptive phase. Along with an increase of volcanic earthquakes, a small explosion was observed yesterday night (at 00:50 local time on 25 Aug 2017). ... [more]
Wednesday, May 31, 2017
The volcano has remained calm since the series of powerful explosions in Jan-Feb this year. A recent report by scientists from the Universidad de Colima mentioned ongoing seismic activity as well as very week explosions. [more]

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.
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Source: GVP, Smithsonian Institute - Colima information

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