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Earthquake deformation cycle in the Andean Back Arc, western ArgentinaIt is pointed out that the 1977 Caucete earthquake was an east-west compressive event which occurred at a depth of about 17 km in the Andean back arc approximately 450 km east of the Chile trench. The present study is primarily concerned with the mechanics of fault behavior prior to and after the 1977 earthquake, as evidenced by preseismic and postseismic vertical deformation. Simple fault models for each phase of deformation are presented. The models of preseismic slip, coseismic slip, and postseismic slip consist of uniform dislocations in an elastic half-space following the method of Chinnery (1961). The basically elastic models presented demonstrate that deformations in the vicinity of the 1977 Caucete, Argentina, earthquake are consistent with activity on some portion of the coseismic fault. This is evidence that these deformations are directly related to the processes of strain accumulation and release associated with the event.
Document ID
19860035482
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Reilinger, R.
(Air Force Geophysics Lab. Hanscom AFB, MA, United States)
Kadinsky-Cade, K.
(USAF, Geophysics Laboratory, Bedford MA, United States)
Date Acquired
August 12, 2013
Publication Date
December 10, 1985
Publication Information
Publication: Journal of Geophysical Research
Volume: 90
ISSN: 0148-0227
Subject Category
Geophysics
Accession Number
86A20220
Funding Number(s)
CONTRACT_GRANT: F19628-83-C-0097
CONTRACT_GRANT: NAS5-27339
Distribution Limits
Public
Copyright
Other

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