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Title: Coupled afterslip and transient mantle flow after the 2011 Tohoku earthquake
Authors: Moore, James Daniel Paul
Barbot, Sylvain
Iinuma, T.
Ohta, Y.
Iwamori, H.
Muto, J.
Keywords: Postseismic Deformation
Viscoelastic Flow
Issue Date: 2019
Source: Muto, J., Moore, J. D. P., Barbot, S., Iinuma, T., Ohta, Y., & Iwamori, H. (2019). Coupled afterslip and transient mantle flow after the 2011 Tohoku earthquake. Science Advances, 5(9), eaaw1164-. doi:10.1126/sciadv.aaw1164
Series/Report no.: Science Advances
Abstract: Modeling of postseismic deformation following great earthquakes has revealed the viscous structure of the mantle and the frictional properties of the fault interface. However, for giant megathrust events, viscoelastic flow and afterslip mechanically interplay with each other during the postseismic period. We explore the role of afterslip and viscoelastic relaxation and their interaction in the aftermath of the 2011 Mw (moment magnitude) 9.0 Tohoku earthquake based on a detailed model analysis of the postseismic deformation with laterally varying, experimentally constrained, rock rheology. Mechanical coupling between viscoelastic relaxation and afterslip notably modifies both the afterslip distribution and surface deformation. Thus, we highlight the importance of addressing mechanical coupling for long-term studies of postseismic relaxation, especially in the context of the geodynamics of the Japan trench across the seismic cycle.
DOI: 10.1126/sciadv.aaw1164
Research Centres: Earth Observatory of Singapore 
Rights: © 2019 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S.Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC).
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:EOS Journal Articles

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