Report on Reventador (Ecuador) — 17 February-23 February 2010
Smithsonian Institution / US Geological Survey
Weekly Volcanic Activity Report, 17 February-23 February 2010
Managing Editor: Sally Sennert.
Please cite this report as:
Global Volcanism Program, 2010. Report on Reventador (Ecuador) (Sennert, S, ed.). Weekly Volcanic Activity Report, 17 February-23 February 2010. Smithsonian Institution and US Geological Survey.
0.077°S, 77.656°W; summit elev. 3562 m
All times are local (unless otherwise noted)
The MODIS satellite detected a thermal anomaly over Reventador on 14 February. Based on information from the Guayaquil MWO, the Washington VAAC reported an ash emission on 18 February. Ash was not identified in satellite imagery. IG reported that seismic signals indicated an emission that day, but weather conditions prevented visual observations.
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 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 left extensive deposits on the scarp slope. 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.