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Report on Turrialba (Costa Rica) — 24 January-30 January 2018

Smithsonian / US Geological Survey Weekly Volcanic Activity Report, 24 January-30 January 2018
Managing Editor: Sally Kuhn Sennert

Please cite this report as:

Global Volcanism Program, 2018. Report on Turrialba (Costa Rica). In: Sennert, S K (ed.), Weekly Volcanic Activity Report, 24 January-30 January 2018. Smithsonian Institution and US Geological Survey.

Volcano Profile |  Weekly Report (24 January-30 January 2018)


Turrialba

Costa Rica

10.025°N, 83.767°W; summit elev. 3340 m

All times are local (unless otherwise noted)


OVSICORI-UNA reported that events at Turrialba at 1101 and 1427 on 26 January and at 0920 on 30 January generated plumes that rose 100-200 m above the crater rim and drifted SW.

Geologic Background. Turrialba, the easternmost of Costa Rica's Holocene volcanoes, is a large vegetated basaltic-to-dacitic stratovolcano located across a broad saddle NE of IrazĂș volcano overlooking the city of Cartago. The massive edifice covers an area of 500 km2. Three well-defined craters occur at the upper SW end of a broad 800 x 2200 m summit depression that is breached to the NE. Most activity originated from the summit vent complex, but two pyroclastic cones are located on the SW flank. Five major explosive eruptions have occurred during the past 3500 years. A series of explosive eruptions during the 19th century were sometimes accompanied by pyroclastic flows. Fumarolic activity continues at the central and SW summit craters.

Source: Observatorio Vulcanologico y Sismologico de Costa Rica-Universidad Nacional (OVSICORI-UNA)