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Anelastic response of the earth to a dip slip earthquakeThe deformation induced by a vertical dip slip earthquake is examined using a variety of rheologic models. In this way the complications of dipping faults are avoided, and the phenomenon of transient peripheral warping is clearly revealed. A thrust fault dipping at 30 deg is investigated, and the important effects of dip and the existence of a slab on the asymmetry of strain pulses propagated into the overthrust and subducted lithosphere are demonstrated. One of the signal results of the study is the essential similarity of the strain patterns for Newtonian and non-Newtonian flow laws: the two rheologies give nearly identical strain field geometries. The principal difference between the two, which is readily observable, is in their time evolution. Relaxation in non-Newtonian rheologies tends to be initially fast, then slow at times that are late in comparison with relaxation in a Newtonian rheology. The possibility of simply recalling the time dependence of a Newtonian solution to obtain an approximate solution to a non-Newtonian problem is demonstrated.
Document ID
19830038651
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Melosh, H. J.
(State Univ. of New York Stony Brook, NY, United States)
Raefsky, A.
(New York, State University Stony Brook, NY, United States)
Date Acquired
August 11, 2013
Publication Date
January 10, 1983
Publication Information
Publication: Journal of Geophysical Research
Volume: 88
Subject Category
Geophysics
Accession Number
83A19869
Funding Number(s)
CONTRACT_GRANT: NSG-5267
CONTRACT_GRANT: NCC5-17
Distribution Limits
Public
Copyright
Other

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