Lastarria

Observations of Deformation

Volcano number:355120
Region:
Country:Argentina/Chile
Geodetic measurements?Yes
Deformation observation?Yes
Measurement method(s):InSAR, GPS - continuous, GPS - campaign
Duration of observation:1995-2016 (InSAR), 2010-2016 (Continuous GPS) 2011-2016 (Campaign GPS)
Inferred cause(s) of deformation:Magmatic
Characteristics of deformation:

Uplift at the ‘Lazufre’ area, situated to the south of Lastarria and north of Cordon del Azufre volcano was first detected in ERS interferograms from 1998 (Pritchard & Simons, 2002; Henderson & Pritchard, 2013). The rate of uplift accelerated between 1998 and 2005 up to a maximum rate of 3.5 cm / year and continued at this constant rate between 2005 and 2011  (Henderson and Pritchard, 2013).
The rate of uplift decelerated between 2011 and 2016, when the maximum uplift rate was less than 1.5 cm/year (Henderson et al., 2017). The deformation has been well fit by several different models of magma accumulation in the mid-upper crust (e.g. Ruch and Walter, 2010; Pearse and Lundgren, 2013; Henderson et al., 2017).

Reference(s):Pritchard, M. E., & Simons, M. (2002). A satellite geodetic survey of large-scale deformation of volcanic centres in the central Andes. Nature, 418(6894), 167-171. doi:10.1038/nature00872
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.
Scott T. Henderson, Francisco Delgado, Julie Elliott, Matthew E. Pritchard, Paul R. Lundgren (2017); Decelerating uplift at Lazufre volcanic center, Central Andes, from A.D. 2010 to 2016, and implications for geodetic models. Geosphere ; 13 (5): 1489–1505. doi: https://doi.org/10.1130/GES01441.1
J. Ruch, T.R. Walter (2010), Relationship between the InSAR-measured uplift, the structural framework, and the present-day stress field at Lazufre volcanic area, central Andes.Tectonophysics, 492 (1–4), 133-140, https://doi.org/10.1016/j.tecto.2010.06.003.
Pearse, J., and P. Lundgren (2013), Source model of deformation at Lazufre volcanic center, central Andes, constrained by InSAR time series, Geophys. Res. Lett., 40, 1059–1064, doi:10.1002/grl.50276.
Location:-25.168, -68.507
REST API endpoint (JSON):https://comet.nerc.ac.uk/wp-json/volcanodb/v1/volcano/4804

Latest Sentinel-1 Data

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