Cargando…
Do slow slip events trigger large and great megathrust earthquakes?
Slow slip events have been suggested to trigger subduction earthquakes. However, examples to date have been poorly recorded, occurring offshore, where data are sparse. Better understanding of slow slip events and their influence on subsequent earthquakes is critical for hazard forecasts. We analyze...
Autores principales: | , , , , , |
---|---|
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/PMC6209384/ https://www.ncbi.nlm.nih.gov/pubmed/30402540 http://dx.doi.org/10.1126/sciadv.aat8472 |
_version_ | 1783366903252647936 |
---|---|
author | Voss, N. Dixon, T. H. Liu, Z. Malservisi, R. Protti, M. Schwartz, S. |
author_facet | Voss, N. Dixon, T. H. Liu, Z. Malservisi, R. Protti, M. Schwartz, S. |
author_sort | Voss, N. |
collection | PubMed |
description | Slow slip events have been suggested to trigger subduction earthquakes. However, examples to date have been poorly recorded, occurring offshore, where data are sparse. Better understanding of slow slip events and their influence on subsequent earthquakes is critical for hazard forecasts. We analyze a well-recorded event beginning 6 months before the 2012 M(w) (moment magnitude) 7.6 earthquake in Costa Rica. The event migrates to the eventual megathrust rupture. Peak slip rate reached a maximum of 5 mm/day, 43 days before the earthquake, remaining high until the earthquake. However, changes in Mohr-Coulomb failure stress at the hypocenter were small (0.1 bar). Our data contradict models of earthquake nucleation that involve power law acceleration of slip and foreshocks. Slow slip events may prove useful for short-term earthquake forecasts. |
format | Online Article Text |
id | pubmed-6209384 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2018 |
publisher | American Association for the Advancement of Science |
record_format | MEDLINE/PubMed |
spelling | pubmed-62093842018-11-06 Do slow slip events trigger large and great megathrust earthquakes? Voss, N. Dixon, T. H. Liu, Z. Malservisi, R. Protti, M. Schwartz, S. Sci Adv Research Articles Slow slip events have been suggested to trigger subduction earthquakes. However, examples to date have been poorly recorded, occurring offshore, where data are sparse. Better understanding of slow slip events and their influence on subsequent earthquakes is critical for hazard forecasts. We analyze a well-recorded event beginning 6 months before the 2012 M(w) (moment magnitude) 7.6 earthquake in Costa Rica. The event migrates to the eventual megathrust rupture. Peak slip rate reached a maximum of 5 mm/day, 43 days before the earthquake, remaining high until the earthquake. However, changes in Mohr-Coulomb failure stress at the hypocenter were small (0.1 bar). Our data contradict models of earthquake nucleation that involve power law acceleration of slip and foreshocks. Slow slip events may prove useful for short-term earthquake forecasts. American Association for the Advancement of Science 2018-10-31 /pmc/articles/PMC6209384/ /pubmed/30402540 http://dx.doi.org/10.1126/sciadv.aat8472 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 NonCommercial License 4.0 (CC BY-NC). http://creativecommons.org/licenses/by-nc/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial license (http://creativecommons.org/licenses/by-nc/4.0/) , which permits use, distribution, and reproduction in any medium, so long as the resultant use is not for commercial advantage and provided the original work is properly cited. |
spellingShingle | Research Articles Voss, N. Dixon, T. H. Liu, Z. Malservisi, R. Protti, M. Schwartz, S. Do slow slip events trigger large and great megathrust earthquakes? |
title | Do slow slip events trigger large and great megathrust earthquakes? |
title_full | Do slow slip events trigger large and great megathrust earthquakes? |
title_fullStr | Do slow slip events trigger large and great megathrust earthquakes? |
title_full_unstemmed | Do slow slip events trigger large and great megathrust earthquakes? |
title_short | Do slow slip events trigger large and great megathrust earthquakes? |
title_sort | do slow slip events trigger large and great megathrust earthquakes? |
topic | Research Articles |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6209384/ https://www.ncbi.nlm.nih.gov/pubmed/30402540 http://dx.doi.org/10.1126/sciadv.aat8472 |
work_keys_str_mv | AT vossn doslowslipeventstriggerlargeandgreatmegathrustearthquakes AT dixonth doslowslipeventstriggerlargeandgreatmegathrustearthquakes AT liuz doslowslipeventstriggerlargeandgreatmegathrustearthquakes AT malservisir doslowslipeventstriggerlargeandgreatmegathrustearthquakes AT prottim doslowslipeventstriggerlargeandgreatmegathrustearthquakes AT schwartzs doslowslipeventstriggerlargeandgreatmegathrustearthquakes |