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Report on Reventador (Ecuador) — 8 May-14 May 2013


Reventador

Smithsonian / US Geological Survey Weekly Volcanic Activity Report,
8 May-14 May 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, 8 May-14 May 2013. Smithsonian Institution and US Geological Survey.

Weekly Report (8 May-14 May 2013)

Reventador

Ecuador

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

All times are local (unless otherwise noted)


IG reported that during the morning of 8 May incandescence from Reventador's crater was observed in addition to steam-and-ash plumes that rose 1 km above the crater and drifted NW. Cloud cover prevented observations the rest of the day and most of the time during 9-14 May. At 1700 on 10 May a steam plume with low ash content rose 1 km above the crater, and on 11 May a vapor plume rose 500 m and drifted SW.

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)