Migratory earthquake precursors are dominant on an ice stream fault
Simple fault models predict earthquake nucleation near the eventual hypocenter (self-nucleation). However, some earthquakes have migratory foreshocks and possibly slow slip that travel large distances toward the eventual mainshock hypocenter (migratory nucleation). Scarce observations of migratory n...
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ftpubmed:oai:pubmedcentral.nih.gov:7864576 2023-05-15T13:37:54+02:00 Migratory earthquake precursors are dominant on an ice stream fault Barcheck, G. Brodsky, E. E. Fulton, P. M. King, M. A. Siegfried, M. R. Tulaczyk, S. 2021-02-05 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7864576/ http://www.ncbi.nlm.nih.gov/pubmed/33547072 https://doi.org/10.1126/sciadv.abd0105 en eng American Association for the Advancement of Science http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7864576/ http://www.ncbi.nlm.nih.gov/pubmed/33547072 http://dx.doi.org/10.1126/sciadv.abd0105 Copyright © 2021 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). https://creativecommons.org/licenses/by-nc/4.0/ https://creativecommons.org/licenses/by-nc/4.0/This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial license (https://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. CC-BY-NC Sci Adv Research Articles Text 2021 ftpubmed https://doi.org/10.1126/sciadv.abd0105 2021-02-21T01:24:12Z Simple fault models predict earthquake nucleation near the eventual hypocenter (self-nucleation). However, some earthquakes have migratory foreshocks and possibly slow slip that travel large distances toward the eventual mainshock hypocenter (migratory nucleation). Scarce observations of migratory nucleation may result from real differences between faults or merely observational limitations. We use Global Positioning System and passive seismic records of the easily observed daily ice stream earthquake cycle of the Whillans Ice Plain, West Antarctica, to quantify the prevalence of migratory versus self-nucleation in a large-scale, natural stick-slip system. We find abundant and predominantly migratory precursory slip, whereas self-nucleation is nearly absent. This demonstration that migratory nucleation exists on a natural fault implies that more-observable migratory precursors may also occur before some earthquakes. Text Antarc* Antarctica West Antarctica PubMed Central (PMC) West Antarctica Whillans ENVELOPE(-64.250,-64.250,-84.450,-84.450) Science Advances 7 6 eabd0105 |
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Research Articles |
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Research Articles Barcheck, G. Brodsky, E. E. Fulton, P. M. King, M. A. Siegfried, M. R. Tulaczyk, S. Migratory earthquake precursors are dominant on an ice stream fault |
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Research Articles |
description |
Simple fault models predict earthquake nucleation near the eventual hypocenter (self-nucleation). However, some earthquakes have migratory foreshocks and possibly slow slip that travel large distances toward the eventual mainshock hypocenter (migratory nucleation). Scarce observations of migratory nucleation may result from real differences between faults or merely observational limitations. We use Global Positioning System and passive seismic records of the easily observed daily ice stream earthquake cycle of the Whillans Ice Plain, West Antarctica, to quantify the prevalence of migratory versus self-nucleation in a large-scale, natural stick-slip system. We find abundant and predominantly migratory precursory slip, whereas self-nucleation is nearly absent. This demonstration that migratory nucleation exists on a natural fault implies that more-observable migratory precursors may also occur before some earthquakes. |
format |
Text |
author |
Barcheck, G. Brodsky, E. E. Fulton, P. M. King, M. A. Siegfried, M. R. Tulaczyk, S. |
author_facet |
Barcheck, G. Brodsky, E. E. Fulton, P. M. King, M. A. Siegfried, M. R. Tulaczyk, S. |
author_sort |
Barcheck, G. |
title |
Migratory earthquake precursors are dominant on an ice stream fault |
title_short |
Migratory earthquake precursors are dominant on an ice stream fault |
title_full |
Migratory earthquake precursors are dominant on an ice stream fault |
title_fullStr |
Migratory earthquake precursors are dominant on an ice stream fault |
title_full_unstemmed |
Migratory earthquake precursors are dominant on an ice stream fault |
title_sort |
migratory earthquake precursors are dominant on an ice stream fault |
publisher |
American Association for the Advancement of Science |
publishDate |
2021 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7864576/ http://www.ncbi.nlm.nih.gov/pubmed/33547072 https://doi.org/10.1126/sciadv.abd0105 |
long_lat |
ENVELOPE(-64.250,-64.250,-84.450,-84.450) |
geographic |
West Antarctica Whillans |
geographic_facet |
West Antarctica Whillans |
genre |
Antarc* Antarctica West Antarctica |
genre_facet |
Antarc* Antarctica West Antarctica |
op_source |
Sci Adv |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7864576/ http://www.ncbi.nlm.nih.gov/pubmed/33547072 http://dx.doi.org/10.1126/sciadv.abd0105 |
op_rights |
Copyright © 2021 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). https://creativecommons.org/licenses/by-nc/4.0/ https://creativecommons.org/licenses/by-nc/4.0/This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial license (https://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. |
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CC-BY-NC |
op_doi |
https://doi.org/10.1126/sciadv.abd0105 |
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Science Advances |
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7 |
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6 |
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