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Postseismic Viscoelastic Rebound | | Amos Nur
; Gerald Mavko
; | | Date: |
18 Jan 1974 | | Journal: | Science, 183 (4121), 204-206 | | Abstract: | The sudden appearance of a dislocation, representing an earthquake, in an elastic layer (the lithosphere) overriding a viscoelastic half space (the asthenosphere) is followed by time-dependent surface deformation, which is very similar to in situ postseismic deformation. The spectacular postseismic deformation following the large Nankaido earthquake of 1946 yields for the asthenosphere a viscosity of 5 x 10(19) poise and a 50 percent relaxation of the shear modulus. Large thrust type earthquakes may provide, in the future, a new method for exploring the rheology of the earth’s upper mantle. | | Source: | PubMed, pmid17777265 doi: 10.1126/science.183.4121.204 | | Services: | Forum | Review | Favorites | |
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