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Kinematic Representations of Linear and Power-Law Viscoelastic Deformation Through the Earthquake Cycle

Meade, Brendan J. and Mallick, Rishav and Carrero-Mustelier, Emily (2022) Kinematic Representations of Linear and Power-Law Viscoelastic Deformation Through the Earthquake Cycle. Geophysical Research Letters, 49 (17). Art. No. e2022GL100266. ISSN 0094-8276. doi:10.1029/2022gl100266.

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Viscoelastic deformation below the Earth's elastic crust is modulated by stresses generated by both plate tectonic and earthquake cycle processes. Rapid near-fault deformation following large earthquakes has been interpreted as the signature of viscoelastic stress diffusion in the upper mantle and earthquake cycle models have been developed that integrated this effect throughout the duration of the earthquake cycle. Here we develop a surrogate method to approximate the upper crustal kinematics associated with time-dependent viscoelastic deformation that does not require knowledge of nor provide constraints on subcrustal rheology. To do this we show how the effects of deformation in the viscoelastic upper mantle can be emulated by introducing a set of effective dislocations at crust-mantle interface. The approach is shown to approximate both linear and power-law viscoelastic rheologies and offers a way to accurately represent viscoelastic kinematics even in the case where upper mantle rheology is poorly constrained.

Item Type:Article
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URLURL TypeDescription
Meade, Brendan J.0000-0003-2940-3316
Mallick, Rishav0000-0002-8983-0849
Carrero-Mustelier, Emily0000-0002-3350-4868
Additional Information:The authors thank three anonymous reviewers for thoughtful reviews. Data Availability Statement. Matlab programs to reproduce all calculations are available at: with
Issue or Number:17
Record Number:CaltechAUTHORS:20220909-224192000
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:116786
Deposited By: Donna Wrublewski
Deposited On:08 Dec 2022 17:56
Last Modified:08 Dec 2022 17:56

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