Change of deep subduction seismicity after a large megathrust earthquake

Blandine Gardonio (), David Marsan, Thomas Bodin, Anne Socquet, Stéphanie Durand, Mathilde Radiguet, Yanick Ricard and Alexandre Schubnel
Additional contact information
Blandine Gardonio: Univ Lyon 1, ENSL, CNRS, LGL-TPE
David Marsan: Univ. Grenoble Alpes, Univ. Savoie Mont Blanc, CNRS, IRD, University Gustave Eiffel, ISTerre
Thomas Bodin: Univ Lyon 1, ENSL, CNRS, LGL-TPE
Anne Socquet: Univ. Grenoble Alpes, Univ. Savoie Mont Blanc, CNRS, IRD, University Gustave Eiffel, ISTerre
Stéphanie Durand: Univ Lyon 1, ENSL, CNRS, LGL-TPE
Mathilde Radiguet: Univ. Grenoble Alpes, Univ. Savoie Mont Blanc, CNRS, IRD, University Gustave Eiffel, ISTerre
Yanick Ricard: Univ Lyon 1, ENSL, CNRS, LGL-TPE
Alexandre Schubnel: PSL Research University

Nature Communications, 2024, vol. 15, issue 1, 1-9

Abstract: Abstract Subduction zones are home to the world’s largest and deepest earthquakes. Recently, large-scale interactions between shallow (0-60 km) and intermediate (80-150 km) seismicity have been evidenced during the interseismic period but also before and after megathrust earthquakes along with large-scale changes in surface motion. Large-scale deformation transients following major earthquakes have also been observed possibly due to a post-seismic change in slab pull or to a bending/unbending of the plates, which suggests the existence of interactions between the deep and shallow parts of the slab. In this study, we analyze the spatio-temporal variations of the declustered seismicity in Japan from 2000 to 2011/3/11 and from 2011/3/11 to 2013/3/11. We observe that the background rate of the intermediate to deep (150-450 km) seismicity underwent a deceleration of 55% south of the rupture zone and an acceleration of 30% north of it after the Tohoku-oki earthquake, consistent with the GPS surface displacements. This shows how a megathrust earthquake can affect the stress state of the slab over a 2500 km lateral range and a large depth range, demonstrating that earthquakes interact at a much greater scale than the surrounding rupture zone usually considered.

Date: 2024
References: View references in EconPapers View complete reference list from CitEc
Citations:

Downloads: (external link)
https://www.nature.com/articles/s41467-023-43935-3 Abstract (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-023-43935-3

Ordering information: This journal article can be ordered from
https://www.nature.com/ncomms/

DOI: 10.1038/s41467-023-43935-3

Access Statistics for this article

Nature Communications is currently edited by Nathalie Le Bot, Enda Bergin and Fiona Gillespie

More articles in Nature Communications from Nature
Bibliographic data for series maintained by Sonal Shukla () and Springer Nature Abstracting and Indexing ().