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Revealing the cluster of slow transients behind a large slow slip event

Capable of reaching similar magnitudes to large megathrust earthquakes [M(w) (moment magnitude) > 7], slow slip events play a major role in accommodating tectonic motion on plate boundaries through predominantly aseismic rupture. We demonstrate here that large slow slip events are a cluster of sh...

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Autores principales: Frank, William B., Rousset, Baptiste, Lasserre, Cécile, Campillo, Michel
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Association for the Advancement of Science 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5976274/
https://www.ncbi.nlm.nih.gov/pubmed/29854951
http://dx.doi.org/10.1126/sciadv.aat0661
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author Frank, William B.
Rousset, Baptiste
Lasserre, Cécile
Campillo, Michel
author_facet Frank, William B.
Rousset, Baptiste
Lasserre, Cécile
Campillo, Michel
author_sort Frank, William B.
collection PubMed
description Capable of reaching similar magnitudes to large megathrust earthquakes [M(w) (moment magnitude) > 7], slow slip events play a major role in accommodating tectonic motion on plate boundaries through predominantly aseismic rupture. We demonstrate here that large slow slip events are a cluster of short-duration slow transients. Using a dense catalog of low-frequency earthquakes as a guide, we investigate the M(w) 7.5 slow slip event that occurred in 2006 along the subduction interface 40 km beneath Guerrero, Mexico. We show that while the long-period surface displacement, as recorded by Global Positioning System, suggests a 6-month duration, the motion in the direction of tectonic release only sporadically occurs over 55 days, and its surface signature is attenuated by rapid relocking of the plate interface. Our proposed description of slow slip as a cluster of slow transients forces us to re-evaluate our understanding of the physics and scaling of slow earthquakes.
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spelling pubmed-59762742018-05-31 Revealing the cluster of slow transients behind a large slow slip event Frank, William B. Rousset, Baptiste Lasserre, Cécile Campillo, Michel Sci Adv Research Articles Capable of reaching similar magnitudes to large megathrust earthquakes [M(w) (moment magnitude) > 7], slow slip events play a major role in accommodating tectonic motion on plate boundaries through predominantly aseismic rupture. We demonstrate here that large slow slip events are a cluster of short-duration slow transients. Using a dense catalog of low-frequency earthquakes as a guide, we investigate the M(w) 7.5 slow slip event that occurred in 2006 along the subduction interface 40 km beneath Guerrero, Mexico. We show that while the long-period surface displacement, as recorded by Global Positioning System, suggests a 6-month duration, the motion in the direction of tectonic release only sporadically occurs over 55 days, and its surface signature is attenuated by rapid relocking of the plate interface. Our proposed description of slow slip as a cluster of slow transients forces us to re-evaluate our understanding of the physics and scaling of slow earthquakes. American Association for the Advancement of Science 2018-05-30 /pmc/articles/PMC5976274/ /pubmed/29854951 http://dx.doi.org/10.1126/sciadv.aat0661 Text en Copyright © 2018 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 License 4.0 (CC BY). http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Research Articles
Frank, William B.
Rousset, Baptiste
Lasserre, Cécile
Campillo, Michel
Revealing the cluster of slow transients behind a large slow slip event
title Revealing the cluster of slow transients behind a large slow slip event
title_full Revealing the cluster of slow transients behind a large slow slip event
title_fullStr Revealing the cluster of slow transients behind a large slow slip event
title_full_unstemmed Revealing the cluster of slow transients behind a large slow slip event
title_short Revealing the cluster of slow transients behind a large slow slip event
title_sort revealing the cluster of slow transients behind a large slow slip event
topic Research Articles
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5976274/
https://www.ncbi.nlm.nih.gov/pubmed/29854951
http://dx.doi.org/10.1126/sciadv.aat0661
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