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Report on Reventador (Ecuador) — 27 February-5 March 2013

Smithsonian / US Geological Survey Weekly Volcanic Activity Report, 27 February-5 March 2013
Managing Editor: Sally Kuhn Sennert

Please cite this report as:

Global Volcanism Program, 2013. Report on Reventador (Ecuador). In: Sennert, S K (ed.), Weekly Volcanic Activity Report, 27 February-5 March 2013. Smithsonian Institution and US Geological Survey.

Volcano Profile |  Weekly Report (27 February-5 March 2013)


Reventador

Ecuador

0.077°S, 77.656°W; summit elev. 3562 m

All times are local (unless otherwise noted)


According to the Washington VAAC, the IG reported that on 2 March lava flows were observed, and a gas-and-ash plume rose to an altitude of 4 km (13,000 ft) a.s.l. and drifted SW. About an hour later a pilot observed an ash plume that rose to the same altitude. No ash plumes were identified in satellite imagery, however a weak thermal anomaly was observed during 2-3 March.

Geologic Background. Reventador is the most frequently active of a chain of Ecuadorian volcanoes in the Cordillera Real, well east of the principal volcanic axis. The forested, dominantly andesitic Volcán El Reventador stratovolcano rises to 3562 m above the jungles of the western Amazon basin. A 4-km-wide caldera widely breached to the east was formed by edifice collapse and is partially filled by a young, unvegetated stratovolcano that rises about 1300 m above the caldera floor to a height comparable to the caldera rim. It has been the source of numerous lava flows as well as explosive eruptions that were visible from Quito in historical time. Frequent lahars in this region of heavy rainfall have constructed a debris plain on the eastern floor of the caldera. The largest historical eruption took place in 2002, producing a 17-km-high eruption column, pyroclastic flows that traveled up to 8 km, and lava flows from summit and flank vents.

Source: Washington Volcanic Ash Advisory Center (VAAC)