The slow self-arresting nature of low-frequency earthquakes.
Journal
Nature communications
ISSN: 2041-1723
Titre abrégé: Nat Commun
Pays: England
ID NLM: 101528555
Informations de publication
Date de publication:
15 Sep 2021
15 Sep 2021
Historique:
received:
12
03
2021
accepted:
23
08
2021
entrez:
16
9
2021
pubmed:
17
9
2021
medline:
17
9
2021
Statut:
epublish
Résumé
Low-frequency earthquakes are a series of recurring small earthquakes that are thought to compose tectonic tremors. Compared with regular earthquakes of the same magnitude, low-frequency earthquakes have longer source durations and smaller stress drops and slip rates. The mechanism that drives their unusual type of stress accumulation and release processes is unknown. Here, we use phase diagrams of rupture dynamics to explore the connection between low-frequency earthquakes and regular earthquakes. By comparing the source parameters of low-frequency earthquakes from 2001 to 2016 in Parkfield, on the San Andreas Fault, with those from numerical simulations, we conclude that low-frequency earthquakes are earthquakes that self-arrest within the rupture patch without any introduced interference. We also explain the scaling property of low-frequency earthquakes. Our findings suggest a framework for fault deformation in which nucleation asperities can release stress through slow self-arrest processes.
Identifiants
pubmed: 34526501
doi: 10.1038/s41467-021-25823-w
pii: 10.1038/s41467-021-25823-w
pmc: PMC8443596
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
5464Subventions
Organisme : National Natural Science Foundation of China (National Science Foundation of China)
ID : 41790465
Organisme : National Natural Science Foundation of China (National Science Foundation of China)
ID : 41874054
Organisme : National Natural Science Foundation of China (National Science Foundation of China)
ID : U1901602
Informations de copyright
© 2021. The Author(s).
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