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Report on Reventador (Ecuador) — 6 August-12 August 2014


Reventador

Smithsonian / US Geological Survey Weekly Volcanic Activity Report,
6 August-12 August 2014
Managing Editor: Sally Kuhn Sennert

Please cite this report as:

Global Volcanism Program, 2014. Report on Reventador (Ecuador). In: Sennert, S K (ed.), Weekly Volcanic Activity Report, 6 August-12 August 2014. Smithsonian Institution and US Geological Survey.

Weekly Report (6 August-12 August 2014)

Reventador

Ecuador

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

All times are local (unless otherwise noted)


IG reported moderate volcanic activity including explosions, long period earthquakes, harmonic tremor, and tremor at Reventador during 6-12 August. On 6 August a dark gray plume rose 300 m above the summit and drifted NW. On 7, 8 and 10 August steam and steam-and-minor ash rose 300 to 800 m above the summit and drifted SW and NW. On 9 August views of the volcano were obscured by clouds and no report was available 11 August.

Geological Summary. Volcán El 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 stratovolcano has 4-km-wide avalanche scarp open to the E formed by edifice collapse. A young, unvegetated, cone rises from the amphitheater floor about 1,300 m to a height comparable to the rim. It has been the source of numerous lava flows as well as explosive eruptions visible from Quito, about 90 km ESE. Frequent lahars in this region of heavy rainfall have constructed a debris plain on the eastern floor of the scarp. The largest recorded 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: Instituto Geofísico-Escuela Politécnica Nacional (IG)