CaltechAUTHORS
  A Caltech Library Service

An InSAR-based survey of volcanic deformation in the southern Andes

Pritchard, M. E. and Simons, M. (2004) An InSAR-based survey of volcanic deformation in the southern Andes. Geophysical Research Letters, 31 (15). Art. No. L15610. ISSN 0094-8276. doi:10.1029/2004GL020545. https://resolver.caltech.edu/CaltechAUTHORS:20131011-143848266

[img]
Preview
PDF - Published Version
See Usage Policy.

200kB
[img] Plain Text (Read Me) - Supplemental Material
See Usage Policy.

584B
[img] Plain Text (Table 1) - Published Version
See Usage Policy.

1kB
[img] Plain Text (Table 2) - Supplemental Material
See Usage Policy.

2kB
[img]
Preview
Postscript (Figures) - Supplemental Material
See Usage Policy.

1MB

Use this Persistent URL to link to this item: https://resolver.caltech.edu/CaltechAUTHORS:20131011-143848266

Abstract

We use Interferometric Synthetic Aperture Radar (InSAR) to search for surface deformation in the southern Andes (40°S–46°S and 49°S–53°S) associated with magmatic processes. Although the available data are not optimal, we can constrain the amount of volcanic deformation at about 27 Holocene volcanoes between the years 1993–1999. 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. Within the errors of the measurements, the rate of deformation is constant from 1993–1998 (10–30 × 10^6 m^3/year). At this rate, 100–200 years is required to accumulate the volume of material erupted in 1991.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1029/2004GL020545 DOIArticle
http://onlinelibrary.wiley.com/doi/10.1029/2004GL020545/abstractPublisherArticle
ORCID:
AuthorORCID
Simons, M.0000-0003-1412-6395
Additional Information:© 2004 by the American Geophysical Union. Received 18 May 2004; revised 30 June 2004; accepted 8 July 2004; published 6 August 2004. We thank two anonymous referees for comments and R. B. Lohman, Y. Fialko, and L. Rivera for modeling software. ERS SAR imagery was acquired under a Category 1 research project from the European Space Agency. The GMT program was used to create several figures [Wessel and Smith, 1998]. M.E.P. was partly supported by a Hess postdoctoral fellowship from Princeton University. Contribution number 9081 of the Division of Geological and Planetary Science, Seismological Laboratory, California Institute of Technology.
Funders:
Funding AgencyGrant Number
Princeton University Hess Postdoctoral FellowshipUNSPECIFIED
Other Numbering System:
Other Numbering System NameOther Numbering System ID
Caltech Division of Geological and Planetary Sciences9081
Issue or Number:15
DOI:10.1029/2004GL020545
Record Number:CaltechAUTHORS:20131011-143848266
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20131011-143848266
Official Citation:Pritchard, M. E., and M. Simons (2004), An InSAR-based survey of volcanic deformation in the southern Andes, Geophys. Res. Lett., 31, L15610, doi:10.1029/2004GL020545
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:41907
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:14 Oct 2013 18:38
Last Modified:10 Nov 2021 04:35

Repository Staff Only: item control page