Static Coulomb stress load on a three-dimensional rate-and-state fault: Possible explanation of the anomalous delay of the 2004 Parkfield earthquake
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F16%3A10331059" target="_blank" >RIV/00216208:11320/16:10331059 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1002/2015JB012646" target="_blank" >http://dx.doi.org/10.1002/2015JB012646</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1002/2015JB012646" target="_blank" >10.1002/2015JB012646</a>
Alternative languages
Result language
angličtina
Original language name
Static Coulomb stress load on a three-dimensional rate-and-state fault: Possible explanation of the anomalous delay of the 2004 Parkfield earthquake
Original language description
We perform quasi-dynamic modeling of earthquake cycle using laboratory derived rate-and-state laws of friction on a homogeneous three-dimensional fault model. We study effects of the static Coulomb stress loading on clock advance and clock delay of the subsequent event. We carefully investigate dependences of the clock advance on the onset time of the stress load, its amplitude, areal extent, and place of application of the load. We find that these dependences are complex, being controlled by the actual ongoing slip velocity on the fault, especially at the domain of the stress load. In particular, the stress (un)load can initiate the occurrence of quasiperiodic creep-like episodes, which could be associated with episodic increases of microseismicity on real faults, such as observed on the locked Parkfield segment of the San Andreas Fault. Depending on the load parameters including its timing within the earthquake cycle, one of such creep-like events may trigger the next (clock advanced) system-size earthquake. In some cases, the nucleation of the main shock can fail, and the fault experiences one or several seismic events of smaller magnitudes instead. In such a case the next main shock becomes significantly delayed. We speculate that such mechanism could have contributed to the extreme delay of the M6 2004 Parkfield earthquake. Indeed, the Parkfield segment was subject to Coulomb stress unload due to the 1983 Coalinga-Nunez earthquakes and then experienced M4.9 events in 1993-1994, when the system-size event was expected. Instead, these failed main shock nucleations delayed the Parkfield earthquake by another similar to 10 years.
Czech name
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Czech description
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Classification
Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
DC - Seismology, volcanology and Earth structure
OECD FORD branch
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Result continuities
Project
<a href="/en/project/GA14-04372S" target="_blank" >GA14-04372S: Multiscale spatial-temporal complexity of tectonic earthquake sources</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2016
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
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Volume of the periodical
121
Issue of the periodical within the volume
5
Country of publishing house
US - UNITED STATES
Number of pages
17
Pages from-to
3517-3533
UT code for WoS article
000381626900021
EID of the result in the Scopus database
2-s2.0-84969972606