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Pacaya volcano satellite image by (c) Google Earth View
Pacaya volcano satellite image by (c) Google Earth View
News:
Weak incandescent spot, but no degassing from Mackenney crater on 8 Jan 2015 (Landsat 8 image / processed by Rudiger Escobar Wolf @rudigerescobar / twitter)
Thursday, Jan 15, 2015
The volcano is becoming active again. In a special bulletin yesterday, INSIVUMEH reported that ash emissions occurred from the volcano. ... [more]
Saturday, Dec 27, 2014
INSIVUMEH reported a week ago that activity decreased and that there are currently no signs of explosive activity from the Mackenney crater. Only a steam and gas plume is being emitted. [more]

Pacaya volcano

Complex volcano 2552 m (8,373 ft)
Guatemala, 14.38°N / -90.6°W
Current status: minor activity or eruption warning (3 out of 5)
Pacaya webcams / live data
Last update: 15 Jan 2015 (ash emissions, thermal anomaly in Mackenney crater)
Typical eruption style: Mildly explosive and effusive (Strombolian activity, lava fountaining, lava flows from the summit crater). Near continuously active the least during the past centuries.
Pacaya volcano eruptions: 1360, 1565, 1623(?), 1651, 1655, 1664, 1668, 1671, 1674, 1677(?), 1678, 1690, 1693, 1699, 1717(?), 1760(?), 1775, 1805, 1830(?), 1846, 1885, 1961, 1965, 1970, 2972, 1973, 1976, 1977, 1978, 1980 - May 1998 (intense period of summit activity), 1999-2003, 2004-2010, 2012, 2013, 2014
TimeMag. / DepthDistanceLocation
Wed, 24 Dec
Wed, 24 Dec 17:40 UTCM 4.2 / 0.8 km30 km Nicaragua
Pacaya volcano near Guatemala City is one of Guatemala's most active volcanoes, and its frequent eruptions are often visible from Guatemala City. Typical activity in recent years includes strombolian activity, lava flow emission and intermittend violent phases of lava fountaining.

Background:

Pacaya is a complex basaltic volcano constructed just outside the southern topographic rim of the 14 x 16 km Pleistocene Amatitlán caldera. A cluster of dacitic lava domes occupies the southern caldera floor. The post-caldera Pacaya massif includes the Cerro Grande lava dome and a younger volcano to the SW. Collapse of Pacaya volcano about 1100 years ago produced a debris-avalanche deposit that extends 25 km onto the Pacific coastal plain and left an arcuate somma rim inside which the modern Pacaya volcano (MacKenney cone) grew. A subsidiary crater, Cerro Chino, was constructed on the NW somma rim and was last active in the 19th century.
During the past several decades, activity at Pacaya has consisted of frequent strombolian eruptions with intermittent lava flow extrusion that has partially filled in the caldera moat and armored the flanks of MacKenney cone, punctuated by occasional larger explosive eruptions that partially destroy the summit of the cone.
Source: GVP

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