Report on Sangay (Ecuador) — January 2009
Bulletin of the Global Volcanism Network, vol. 34, no. 1 (January 2009)
Managing Editor: Richard Wunderman.
Sangay (Ecuador) Thermal anomalies and a minor ash plume during 2008
Please cite this report as:
Global Volcanism Program, 2009. Report on Sangay (Ecuador). In: Wunderman, R. (ed.), Bulletin of the Global Volcanism Network, 34:1. Smithsonian Institution. https://doi.org/10.5479/si.GVP.BGVN200901-352090.
2.005°S, 78.341°W; summit elev. 5286 m
All times are local (unless otherwise noted)
Ash plumes were reported between October 2006 and December 2007 (BGVN 33:03). Thermal anomalies have been detected between 27 March and 4 December 2008 (table 2). A minor ash plume was seen on satellite imagery and by pilots drifting WNW on 24 September 2008.
|Date (UTC)||Time (UTC)||Pixels||Satellite|
|27 Mar 2008||0320||1||Terra|
|08 Apr 2008||0345||1||Terra|
|26 Sep 2008||0325||1||Terra|
|26 Sep 2008||0625||1||Aqua|
|28 Sep 2008||1535||1||Terra|
|03 Oct 2008||0630||1||Aqua|
|05 Oct 2008||0320||1||Terra|
|15 Oct 2008||0355||1||Terra|
|15 Oct 2008||0655||1||Aqua|
|19 Oct 2008||0330||2||Terra|
|13 Nov 2008||0325||1||Terra|
|18 Nov 2008||0345||1||Terra|
|18 Nov 2008||0645||1||Aqua|
|04 Dec 2008||0345||1||Terra|
Geologic Background. The isolated Sangay volcano, located east of the Andean crest, is the southernmost of Ecuador's volcanoes and its most active. The steep-sided, glacier-covered, dominantly andesitic volcano grew within horseshoe-shaped calderas of two previous edifices, which were destroyed by collapse to the east, producing large debris avalanches that reached the Amazonian lowlands. The modern edifice dates back to at least 14,000 years ago. It towers above the tropical jungle on the east side; on the other sides flat plains of ash have been sculpted by heavy rains into steep-walled canyons up to 600 m deep. The earliest report of a historical eruption was in 1628. More or less continuous eruptions were reported from 1728 until 1916, and again from 1934 to the present. The almost constant activity has caused frequent changes to the morphology of the summit crater complex.
Information Contacts: Washington Volcanic Ash Advisory Center, Satellite Analysis Branch (SAB), NOAA/NESDIS E/SP23, NOAA Science Center Room 401, 5200 Auth Rd, Camp Springs, MD 20746, USA (URL: http://www.ospo.noaa.gov/Products/atmosphere/vaac/); Hawai'i Institute of Geophysics and Planetology (HIGP) Thermal Alerts System, School of Ocean and Earth Science and Technology (SOEST), University of Hawai'i, 2525 Correa Road, Honolulu, HI 96822, USA (URL: http://modis.higp.hawaii.edu/).