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Pacaya volcano (Guatemala) - Smithsonian / USGS Weekly Volcanic Activity Report for 31 March-6 April 2021 (New Activity / Unrest)

Wed, 31 Mar 2021, 06:00
06:00 AM | BY: VN
INSIVUMEH reported that explosions at Pacaya's Mackenney Crater during 30-31 March produced gas-and-ash plumes that rose 1.8 km above the summit and drifted up to 50 km S, SW, W, and NW. Explosions ejected blocks as high as 150 m above the summit. Lava flows on the W flank advanced to 3 km long and were near La Breña; the flows overtook an unoccupied building on the Campo Alegre farm that was used for monitoring and visitor services.
The flow front was about 500 m from the town of El Patrocinio. Incandescent blocks detached from the end of the lava flow and set fire to vegetation. During 31 March-2 April explosions ejected incandescent blocks as high as 225 m above the summit.
Ash plumes rose 500 m and drifted 20 km S and SW. The SW-flank lava flows remained active. Explosions continued during 3-6 April, with ash plumes rising as high as 1 km and drifting 6-20 km W, SW, and S.
The lava flow continued to be active on the SW flank, setting fire to local vegetation. Strombolian activity ejected material 300 m high during 5-6 April.

Source: Instituto Nacional de Sismologia, Vulcanologia, Meteorologia, e Hidrologia (INSIVUMEH)
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From: Global Volcanism Program, 2021. Report on Pacaya. In: Mayberry, G (ed.), Weekly Volcanic Activity Report 31 March-6 April 2021. Smithsonian Institution and US Geological Survey.

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Pacaya volcano satellite image by (c) Google Earth View
Pacaya volcano satellite image by (c) Google Earth View
Pacaya volcano
Complex volcano 2552 m (8,373 ft)
Guatemala, 14.38°N / -90.6°W
Current status: normal or dormant (1 out of 5) 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, 1972, 1973, 1976, 1977, 1978, 1980 - May 1998 (intense period of summit activity), 1999-2003, 2004-2010, 2012, 2013, 2014
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.

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