Gualandi, A, Liu, Z and Rollins, C (2020) Post-large earthquake seismic activities mediated by aseismic deformation processes. Earth and Planetary Science Letters, 530. 115870. ISSN 0012-821X
Abstract
Two aseismic deformation processes are commonly invoked to explain the transient geodetic surface displacements that follow a major earthquake: afterslip and viscoelastic relaxation. Both induce time dependent stress variations in the crust, potentially affecting aftershock occurrence. However, the two mechanisms' relative impacts on crustal deformation and seismicity remain unclear. We find for the case of the 2010 Mw 7.2 El Mayor-Cucapah (EMC) earthquake not only that afterslip likely drove clustered seismicity after the earthquake, but also that long-range earthquake interactions were likely modulated by viscoelastic relaxation at large scales in space (>5 times the fault rupture length) and time (>7 yr). This has important implications for the study of the “seismic cycle” and for seismic hazard estimation, since post-seismic deformation related to a single Mw 7.2 earthquake affects interseismic velocities and regional seismicity rates for more than a decade.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2019 Elsevier B.V. All rights reserved. This is an author produced version of an conference paper published in Earth and Planetary Science Letters. Uploaded in accordance with the publisher's self-archiving policy. |
Keywords: | afterslip; viscoelastic relaxation; aftershocks; geodetic time series analysis; variational Bayesian independent component analysis; seismic clustering |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Environment (Leeds) > School of Earth and Environment (Leeds) > Inst of Geophysics and Tectonics (IGT) (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 06 Jan 2020 09:50 |
Last Modified: | 25 Oct 2020 00:38 |
Status: | Published |
Publisher: | Elsevier |
Identification Number: | 10.1016/j.epsl.2019.115870 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:155112 |