Low-parametric modeling of the 2015, M-W 8.3 Illapel, Chile earthquake
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F18%3A10388669" target="_blank" >RIV/00216208:11320/18:10388669 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1016/j.jsames.2018.08.006" target="_blank" >http://dx.doi.org/10.1016/j.jsames.2018.08.006</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.jsames.2018.08.006" target="_blank" >10.1016/j.jsames.2018.08.006</a>
Alternative languages
Result language
angličtina
Original language name
Low-parametric modeling of the 2015, M-W 8.3 Illapel, Chile earthquake
Original language description
The M-W 8.3 (GCMT) Illapel megathrust earthquake is investigated. The objective is to find out which features of the previously published rupture scenarios can be resolved by using a regional strong-motion network (epicentral distances 130-260 km) and source models with a few parameters only. Low-frequency waveforms (< 0.05 Hz) at nine stations (Centro Sismologico Nacional, Chile) are subjected to modeling. Various representations of the source are used: (i) multiple-point source models based either on iterative deconvolution or simultaneous inversion of source pairs, (ii) models of circular and elliptical uniform-slip patches, employing synthetic and empirical Green's functions, respectively. This variety of methods provides consistent results. The earthquake appears to be a segmented rupture progressing from an early (deep) moment release to a later (shallow) one, towards the northwest. The source models of slip-uniform patches synchronously suggest a low rupture speed of 1-2 km/s. Despite the different data sets and methods used in this study, the estimate of rupture speed is consistent with independent publications. As for ambiguity in literature regarding the depth and timing of the rupture, our paper clearly prefers the models including a similar to 20-30 s delay of the shallow moment release compared to the initial deep one. The strong-motion data set and low-parametric models proved to be competitive with more sophisticated approaches like multi-parameter slip models using a variety of regional geophysical observables. These results, together with the results from other studies for smaller events, show that strong-motion networks can be useful for studying rupture processes in a wide range of magnitudes, thus promoting the improvement of regional strong-motion networks in poorly instrumented regions.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10500 - Earth and related environmental sciences
Result continuities
Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2018
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 South American Earth Sciences
ISSN
0895-9811
e-ISSN
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Volume of the periodical
88
Issue of the periodical within the volume
December 2018
Country of publishing house
GB - UNITED KINGDOM
Number of pages
13
Pages from-to
144-156
UT code for WoS article
000452946100012
EID of the result in the Scopus database
2-s2.0-85052456612