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Report on Turrialba (Costa Rica) — 1 November-7 November 2017

Smithsonian / US Geological Survey Weekly Volcanic Activity Report, 1 November-7 November 2017
Managing Editor: Sally Kuhn Sennert

Please cite this report as:

Global Volcanism Program, 2017. Report on Turrialba (Costa Rica). In: Sennert, S K (ed.), Weekly Volcanic Activity Report, 1 November-7 November 2017. Smithsonian Institution and US Geological Survey.

Volcano Profile |  Weekly Report (1 November-7 November 2017)


Turrialba

Costa Rica

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

All times are local (unless otherwise noted)


The Washington VAAC reported that an ash emission from Turrialba was observed in webcam images on 4 November. Ash was not identified in satellite images, though weather cloud cover was increasing and may have obscured views.

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: Washington Volcanic Ash Advisory Center (VAAC)