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Interpretation of postseismic deformation with a viscoelastic relaxation modelA viscoelastic relaxation model is used to interpret postseismic surface deformation for the large-magnitude Aleutian earthquakes of 1957 and 1965. The lithosphere and asthenosphere are modeled as elastic solids with an anomalous viscoelastic inclusion below the island arc volcanoes. It is found that the observed postseismic surface deformation is a corollary of the known island arc structure. A satisfactory fit to the uplift following the 1957 earthquake is found for a viscoelastic volume with 80-km width extending from a depth of 50 to 200 km.
Document ID
19810029775
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Wahr, J.
(Colorado Univ. Boulder, CO, United States)
Wyss, M.
(Cooperative Institute for Research in Environmental Sciences Boulder, Colo., United States)
Date Acquired
August 11, 2013
Publication Date
November 10, 1980
Publication Information
Publication: Journal of Geophysical Research
Volume: 85
Subject Category
Geophysics
Accession Number
81A14179
Funding Number(s)
CONTRACT_GRANT: NSG-7319
Distribution Limits
Public
Copyright
Other

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