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Microseismicity appears to outline highly coupled regions on the Central Chile megathrust

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985530%3A_____%2F21%3A00556297" target="_blank" >RIV/67985530:_____/21:00556297 - isvavai.cz</a>

  • Result on the web

    <a href="https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2021JB022252" target="_blank" >https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2021JB022252</a>

  • DOI - Digital Object Identifier

    <a href="http://dx.doi.org/10.1029/2021JB022252" target="_blank" >10.1029/2021JB022252</a>

Alternative languages

  • Result language

    angličtina

  • Original language name

    Microseismicity appears to outline highly coupled regions on the Central Chile megathrust

  • Original language description

    We compiled a novel microseismicity catalog for the Central Chile megathrust (29 degrees-35 degrees S), comprising 8,750 earthquakes between April 2014 and December 2018. These events describe a pattern of three trenchward open half-ellipses, consisting of a continuous, coast-parallel seismicity band at 30-45 km depth, and narrow elongated seismicity clusters that protrude to the shallow megathrust and separate largely aseismic regions along strike. To test whether these shapes could outline highly coupled regions (asperities) on the megathrust, we invert GPS displacement data for interplate locking. The best-fit locking model does not show good correspondence to seismicity, possibly due to lacking resolution. When we prescribe high locking inside the half-ellipses, however, we obtain models with similar data fits that are preferred according to the Bayesian Information Criterion (BIC). We thus propose that seismicity on the Central Chile megathrust may outline three adjacent highly coupled regions, two of them located between the rupture areas of the 2010 Maule and the 2015 Illapel earthquakes, a segment of the Chilean margin that may be in a late interseismic stage of the seismic cycle.

  • Czech name

  • Czech description

Classification

  • Type

    J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database

  • CEP classification

  • OECD FORD branch

    10507 - Volcanology

Result continuities

  • Project

  • Continuities

    I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Others

  • Publication year

    2021

  • Confidentiality

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

Data specific for result type

  • Name of the periodical

    Journal of Geophysical Research-Solid Earth

  • ISSN

    2169-9313

  • e-ISSN

    2169-9356

  • Volume of the periodical

    126

  • Issue of the periodical within the volume

    11

  • Country of publishing house

    US - UNITED STATES

  • Number of pages

    21

  • Pages from-to

    e2021JB022252

  • UT code for WoS article

    000723102600004

  • EID of the result in the Scopus database

    2-s2.0-85118869774