The 2013 Slab‐Wide Kamchatka Earthquake Sequence
Abstract Studies of initiation of large earthquakes are usually focused on frictional instabilities occurring in the near vicinity of the future rupture. Possible contributions of long‐distance interactions with large‐scale tectonic instabilities remain unknown. Here we analyze seismic catalogs and...
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ftdoajarticles:oai:doaj.org/article:241d6c3fe0c64cd2b4f789574569c434 2024-09-15T18:15:52+00:00 The 2013 Slab‐Wide Kamchatka Earthquake Sequence B. Rousset M. Campillo N. M. Shapiro A. Walpersdorf N. Titkov D. V. Chebrov 2023-02-01T00:00:00Z https://doi.org/10.1029/2022GL101856 https://doaj.org/article/241d6c3fe0c64cd2b4f789574569c434 EN eng Wiley https://doi.org/10.1029/2022GL101856 https://doaj.org/toc/0094-8276 https://doaj.org/toc/1944-8007 1944-8007 0094-8276 doi:10.1029/2022GL101856 https://doaj.org/article/241d6c3fe0c64cd2b4f789574569c434 Geophysical Research Letters, Vol 50, Iss 4, Pp n/a-n/a (2023) Geophysics. Cosmic physics QC801-809 article 2023 ftdoajarticles https://doi.org/10.1029/2022GL101856 2024-08-05T17:49:23Z Abstract Studies of initiation of large earthquakes are usually focused on frictional instabilities occurring in the near vicinity of the future rupture. Possible contributions of long‐distance interactions with large‐scale tectonic instabilities remain unknown. Here we analyze seismic catalogs and geodetic time series during a few months preceding the 2013 M = 8.3 deep‐focus Okhotsk earthquake. This deep‐focus event is preceded by four intense seismic clusters in the seismogenic zone. GNSS time series in Kamchatka revealed a transient landward motion episode 1 month prior to the mainshock, consistent with an increase of seismogenic zone loading. This transient loading episode is accompanied by a doubling of the intermediate depth seismicity rate suggesting a transient slab pull as the origin. These observations question the constant subducting velocity hypotheses and may have implications in the understanding of the long‐distance along‐slab stress interactions and in their contribution to initiation of large deep‐focus earthquakes. Article in Journal/Newspaper Kamchatka Directory of Open Access Journals: DOAJ Articles Geophysical Research Letters 50 4 |
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Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Geophysics. Cosmic physics QC801-809 |
spellingShingle |
Geophysics. Cosmic physics QC801-809 B. Rousset M. Campillo N. M. Shapiro A. Walpersdorf N. Titkov D. V. Chebrov The 2013 Slab‐Wide Kamchatka Earthquake Sequence |
topic_facet |
Geophysics. Cosmic physics QC801-809 |
description |
Abstract Studies of initiation of large earthquakes are usually focused on frictional instabilities occurring in the near vicinity of the future rupture. Possible contributions of long‐distance interactions with large‐scale tectonic instabilities remain unknown. Here we analyze seismic catalogs and geodetic time series during a few months preceding the 2013 M = 8.3 deep‐focus Okhotsk earthquake. This deep‐focus event is preceded by four intense seismic clusters in the seismogenic zone. GNSS time series in Kamchatka revealed a transient landward motion episode 1 month prior to the mainshock, consistent with an increase of seismogenic zone loading. This transient loading episode is accompanied by a doubling of the intermediate depth seismicity rate suggesting a transient slab pull as the origin. These observations question the constant subducting velocity hypotheses and may have implications in the understanding of the long‐distance along‐slab stress interactions and in their contribution to initiation of large deep‐focus earthquakes. |
format |
Article in Journal/Newspaper |
author |
B. Rousset M. Campillo N. M. Shapiro A. Walpersdorf N. Titkov D. V. Chebrov |
author_facet |
B. Rousset M. Campillo N. M. Shapiro A. Walpersdorf N. Titkov D. V. Chebrov |
author_sort |
B. Rousset |
title |
The 2013 Slab‐Wide Kamchatka Earthquake Sequence |
title_short |
The 2013 Slab‐Wide Kamchatka Earthquake Sequence |
title_full |
The 2013 Slab‐Wide Kamchatka Earthquake Sequence |
title_fullStr |
The 2013 Slab‐Wide Kamchatka Earthquake Sequence |
title_full_unstemmed |
The 2013 Slab‐Wide Kamchatka Earthquake Sequence |
title_sort |
2013 slab‐wide kamchatka earthquake sequence |
publisher |
Wiley |
publishDate |
2023 |
url |
https://doi.org/10.1029/2022GL101856 https://doaj.org/article/241d6c3fe0c64cd2b4f789574569c434 |
genre |
Kamchatka |
genre_facet |
Kamchatka |
op_source |
Geophysical Research Letters, Vol 50, Iss 4, Pp n/a-n/a (2023) |
op_relation |
https://doi.org/10.1029/2022GL101856 https://doaj.org/toc/0094-8276 https://doaj.org/toc/1944-8007 1944-8007 0094-8276 doi:10.1029/2022GL101856 https://doaj.org/article/241d6c3fe0c64cd2b4f789574569c434 |
op_doi |
https://doi.org/10.1029/2022GL101856 |
container_title |
Geophysical Research Letters |
container_volume |
50 |
container_issue |
4 |
_version_ |
1810453819118583808 |