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Report on Reventador (Ecuador) — 2 April-8 April 2014


Reventador

Smithsonian / US Geological Survey Weekly Volcanic Activity Report,
2 April-8 April 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, 2 April-8 April 2014. Smithsonian Institution and US Geological Survey.

Weekly Report (2 April-8 April 2014)

Reventador

Ecuador

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

All times are local (unless otherwise noted)


IG reported that cloud cover occasionally prevented visual observations of Reventador during 2-8 April; activity remained high. A steam-and-ash plume rose 3 km and drifted E on 2 April, and a thermal camera detected hot material on the flanks. Four lava flows on the S and SE flanks were observed on 3 April. Ash emissions were observed the next day. On 5 April sporadic ash emissions rose 1 km and drifted W. On 6 April water vapor emissions with low amounts of ash rose 500 m and drifted NW. During 7-8 April lava flows continued to descend the S and SE flanks. On 8 April vapor emissions with small amounts of ash were observed.

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)