Antisana

Volcano number:352030
Region:South America
Country:Ecuador
Geodetic measurements?Yes
Deformation observation?No
Measurement method(s):InSAR
Duration of observation:2007-2011
Inferred cause of deformation:
Characteristics of deformation:

Preliminary ALOS results found Antisana had periods of both inflation and deflation between 2007 and 2008, coincident with a period of high LP seismic actiity (Mothes et al., 2008). However, a regional ALOS survey of Northern Andes Volcanoes found no deformation at Antisana between 2007 and 2011 looking at a larger dataset (Morales Rivera et al., 2016). The preliminary deformation observations are therefore likely to have been atmospheric noise.

Reference:Mothes, P., J. Biggs, S. Baker, S. Hong, F. Amelung, and T. Dixon (2008), Survey of volcanic activity in Ecuador using L-band SAR, Eos Trans. AGU, 89(53), Fall Meet. Suppl., Abstract V51C-2055.
Reference:Morales Rivera, A. M., F. Amelung, and P. Mothes (2016), Volcano deformation survey over the Northern and Central Andes with ALOS InSAR time series, Geochem. Geophys. Geosyst., 17, 2869–2883, doi:10.1002/2016GC006393.
Location:-78.141, -0.481

View from the northwest towards Antisana stratovolcano, looking over Chacana caldera. Photo: Minard Hall, 1976 (Instituto Geofisico, Escuela Politecnica Nacional, Quito)