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Report on Fuego (Guatemala) — 3 January-9 January 2007

Smithsonian / US Geological Survey Weekly Volcanic Activity Report, 3 January-9 January 2007
Managing Editor: Sally Kuhn Sennert

Please cite this report as:

Global Volcanism Program, 2007. Report on Fuego (Guatemala). In: Sennert, S K (ed.), Weekly Volcanic Activity Report, 3 January-9 January 2007. Smithsonian Institution and US Geological Survey.

Volcano Profile |  Weekly Report (3 January-9 January 2007)


Fuego

Guatemala

14.473°N, 90.88°W; summit elev. 3763 m

All times are local (unless otherwise noted)


INSIVUMEH reported that during 4-5 January, constant avalanches of incandescent material from Fuego's central crater and lateral crater (about 70 m from the S edge of the central crater) descended SW towards the Taniluyá River ravine. Several explosions produced shock waves and gas-and-ash clouds that reached altitudes of 4.2-4.8 km (13,800-15,700) a.s.l. Fine ashfall was noted in areas S and about 9-15 km SW of the summit.

Geologic Background. Volcán Fuego, one of Central America's most active volcanoes, is one of three large stratovolcanoes overlooking Guatemala's former capital, Antigua. The scarp of an older edifice, Meseta, lies between 3763-m-high Fuego and its twin volcano to the north, Acatenango. Construction of Meseta dates back to about 230,000 years and continued until the late Pleistocene or early Holocene. Collapse of Meseta may have produced the massive Escuintla debris-avalanche deposit, which extends about 50 km onto the Pacific coastal plain. Growth of the modern Fuego volcano followed, continuing the southward migration of volcanism that began at Acatenango. In contrast to the mostly andesitic Acatenango, eruptions at Fuego have become more mafic with time, and most historical activity has produced basaltic rocks. Frequent vigorous historical eruptions have been recorded since the onset of the Spanish era in 1524, and have produced major ashfalls, along with occasional pyroclastic flows and lava flows.

Source: Instituto Nacional de Sismologia, Vulcanologia, Meteorologia, e Hidrologia (INSIVUMEH)