Cerro Hudson

Observations of Deformation

Volcano number:358057
Geodetic measurements?Yes
Deformation observation?Yes
Measurement method(s):InSAR
Duration of observation:1993-1999
Inferred cause(s) of deformation:Magmatic
Characteristics of deformation:

We detect inflation of Cerro Hudson volcano following its 1991 eruption, and use spherical and non-spherical models to constrain the source of deformation to be between 4 and 8 km below sea level. We measure the rate of deformation to be about 5 cm/year in the radar line-of-sight, and infer that the maximum deformation could exceed 10 cm/year in the center of the caldera Ref 1.
Deformation at Cerro Hudson is difficult to observe because of decorrelation in both the C and L band data (Figure 9), but Envisat data spanning 2004–2008 shows about 2 cm/yr of inflation (Figure 9a). The rate and shape of deformation is consistent with the declining rate of deformation and the depth of the magma chamber from Pritchard and Simons [2004b]. Ref 2

Reference(s):Pritchard, M. E., & Simons, M. (2004). An InSAR‐based survey of volcanic deformation in the southern Andes. Geophysical research letters, 31(15).
Fournier, T. J., Pritchard, M. E., & Riddick, S. N. (2010). Duration, magnitude, and frequency of subaerial volcano deformation events: New results from Latin America using InSAR and a global synthesis. Geochemistry, Geophysics, Geosystems, 11(1).
Location:-45.9, -72.97
REST API endpoint (JSON):https://comet.nerc.ac.uk/wp-json/volcanodb/v1/volcano/4332

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