Cerro Overo

Observations of Deformation

Volcano number:355097
Region:
Country:Chile
Geodetic measurements?Yes
Deformation observation?No
Measurement method(s):InSAR
Duration of observation:1992-2011
Characteristics of deformation:

A regional InSAR survey of Central Andean Volcanoes found that a 20 km diameter area surrounding Cerro Overo was subsiding between 1992 and 2003 at up to 4 mm/year (Henderson & Pritchard, 2013). Between 2003 and 2005 this subsidence transitioned to uplift, and between 2005 and 2011 the volcano was observed to be uplifting at up to 5 mm/year. Based on the similar spatial extent and magnitude of the subsidence and uplift, the authors suggest that both are controlled by a single reversible mechanism involving fluid accumulation and loss within the crust at approximately 10 km depth (Henderson & Pritchard, 2013).

Reference(s):Henderson S. T., and M. E. Pritchard (2013), Decadal volcanic deformation in the Central Andes Volcanic Zone revealed by InSAR time series, Geochem. Geophys. Geosyst., 14, 1358–1374, doi:10.1002/ggge.20074.
Location:-23.52, -67.67
REST API endpoint (JSON):https://comet.nerc.ac.uk/wp-json/volcanodb/v1/volcano/4727

Latest Sentinel-1 Data

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