Postseismic Viscoelastic Rebound
- 18 January 1974
- journal article
- other
- Published by American Association for the Advancement of Science (AAAS) in Science
- Vol. 183 (4121), 204-206
- https://doi.org/10.1126/science.183.4121.204
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 1019 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.Keywords
This publication has 2 references indexed in Scilit:
- Mode of Strain Release Associated with Major Earthquakes in JapanAnnual Review of Earth and Planetary Sciences, 1973
- The elastic residual field of a very long strike-slip fault in the presence of a discontinuityBulletin of the Seismological Society of America, 1971