Sabancaya

Observations of Deformation

Volcano number:354006
Region:
Country:Peru
Geodetic measurements?Yes
Deformation observation?Yes
Measurement method(s):InSAR
Duration of observation:1993-2010 (ERS/Envisat), 2007-2011 (ALOS) 2012-2015 (TSX)
Inferred cause(s) of deformation:Magmatic, Faulting/tectonics
Characteristics of deformation:

Between 1993 and 1998, an area centred 7 km north of Sabancaya was uplifting at a rate of 2 cm/year (Pritchard & Simons 2002). The deformation pattern was well fit by an inflating point source at 11-13 km depth, inferred to be a magmatic source.
In 2003, there was up to  5 cm of subsidence associated with a Mw 5.3 tectonic earthquake to the west of Sabancaya on 13 December 2002 (Jay et al 2015).
No deformation was detected at Sabancaya between 2007 and 2011 during a regional ALOS survey of Northern Andes Volcanoes (Morales Rivera et al., 2016).
TSX interferograms at Sabancaya showed up to 6 cm of subsidence associated with an earthquake swarm in February 2013 (Jay et al 2015). A Mw 5.9 earthquake on 17 July 2013 was accompanied by up to 5 cm uplift and over 15 cm of subsidence. Aftershocks following the 17 July 2013 earthquake were associated with up to 7 cm of subsidence, and approximately 1 cm of post-seismic subsidence was observed between Nov. 2013 and May 2014 (Jay et al 2015).

Reference(s):Pritchard, M. E., and M. Simons, 2002. A satellite geodetic survey of large-scale deformation of volcanic centres in the central Andes. Nature, 418, 167-171. https://dx.doi.org/10.1038/nature00872
Jay, J. A., Delgado, F. J., Torres, J. L., Pritchard, M. E., Macedo, O., and Aguilar, V., 2015. Deformation and seismicity near Sabancaya volcano, southern Peru, from 2002 to 2015.. Geophysical Research Letters, 42, 2780-2788. https://dx.doi.org/10.1002/2015GL063589
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:-15.787, -71.857
REST API endpoint (JSON):https://comet.nerc.ac.uk/wp-json/volcanodb/v1/volcano/4480

Latest Sentinel-1 Data

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