Relation between oceanic plate structure, patterns of interplate locking and microseismicity in the 1922 Atacama seismic gap

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985530%3A_____%2F23%3A00574082" target="_blank" >RIV/67985530:_____/23:00574082 - isvavai.cz</a>

Result on the web

<a href="https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2023GL103565" target="_blank" >https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2023GL103565</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1029/2023GL103565" target="_blank" >10.1029/2023GL103565</a>

Result language

angličtina

Original language name

Relation between oceanic plate structure, patterns of interplate locking and microseismicity in the 1922 Atacama seismic gap

Original language description

We deployed a dense geodetic and seismological network in the Atacama seismic gap in Chile. We derive a microseismicity catalog of >30,000 events, time series from 70 GNSS stations, and utilize a transdimensional Bayesian inversion to estimate interplate locking. We identify two highly locked regions of different sizes whose geometries appear to control seismicity patterns. Interface seismicity concentrates beneath the coastline, just downdip of the highest locking. A region with lower locking (27.5°S–27.7°S) coincides with higher seismicity levels, a high number of repeating earthquakes and events extending toward the trench. This area is situated where the Copiapó Ridge is subducted and has shown previous indications of both seismic and aseismic slip, including an earthquake sequence in 2020. While these findings suggest that the structure of the downgoing oceanic plate prescribes patterns of interplate locking and seismicity, we note that the Taltal Ridge further north lacks a similar signature.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10507 - Volcanology

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2023

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Geophysical Research Letters

ISSN

0094-8276

e-ISSN

1944-8007

Volume of the periodical

50

Issue of the periodical within the volume

15

Country of publishing house

US - UNITED STATES

Number of pages

11

Pages from-to

e2023GL103565

UT code for WoS article

001041264100001

EID of the result in the Scopus database

2-s2.0-85166652593