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The earthquake cycle in subduction zonesA simplified model of a subduction zone is presented, which incorporates the mechanical asymmetry induced by the subducted slab to anchor the subducting plate during post-seismic rebound and thus throw most of the coseismic stream release into the overthrust plate. The model predicts that the trench moves with respect to the deep mantle toward the subducting plate at a velocity equal to one-half of the convergence rate. A strong extensional pulse is propagated into the overthrust plate shortly after the earthquake, and although this extension changes into compression before the next earthquake in the cycle, the period of strong extension following the earthquake may be responsible for extensional tectonic features in the back-arc region.
Document ID
19820036816
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Melosh, H. J.
(New York, State University Stony Brook, NY, United States)
Fleitout, L.
(Paris XI, Universite Orsay, Essonne, France)
Date Acquired
August 10, 2013
Publication Date
January 1, 1982
Publication Information
Publication: Geophysical Research Letters
Volume: 9
Subject Category
Geophysics
Accession Number
82A20351
Funding Number(s)
CONTRACT_GRANT: NAG5-7
CONTRACT_GRANT: NAG5-151
Distribution Limits
Public
Copyright
Other

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