Waveform inversion and focal mechanisms of two weak earthquakes in Cordillera Principal (Argentina) between 35 degrees and 35.5 degrees S
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F16%3A10330102" target="_blank" >RIV/00216208:11320/16:10330102 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1016/j.jsames.2015.12.001" target="_blank" >http://dx.doi.org/10.1016/j.jsames.2015.12.001</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.jsames.2015.12.001" target="_blank" >10.1016/j.jsames.2015.12.001</a>
Alternative languages
Result language
angličtina
Original language name
Waveform inversion and focal mechanisms of two weak earthquakes in Cordillera Principal (Argentina) between 35 degrees and 35.5 degrees S
Original language description
Only few (six) focal mechanism, in CMT Catalog, have been so far known for intraplate shallow events in the Andean chain close to Chile Argentina state border at latitudes similar to 35 degrees S. We add two more mechanisms, depths and moment magnitudes by carefully analyzing full waveforms of weak events recorded by broad-band stations of the Chile Argentina Geophysical Experiment (southern profile). The moment magnitudes of both events (Mw = 3.6 and 3.7) are lower than the duration magnitudes (Md = 4.0 and 4.29) reported by NEIC. The source depth, constrained by waveforms for one of the studied events (5.5-8.5 km) seems to be considerably shallower than the hypocenter depth located by means of arrival times (similar to 20 km). The waveform analysis was complemented by first-motion polarities which resulted in an uncertainty assessment of the focal mechanism. Event 1 (2001-11-03) has a strike-slip mechanism with a small normal component and almost vertical nodal planes in the north-south and east-west directions. The north-south nodal plane could be related to the Calabozos faults system. Event 2 (2002-02-16) has a strike-slip mechanism with a small thrust component. The latter event (its sub horizontal nodal plane) could be associated with the El Diablo-El Fierro fault system. Dextral strike-slip solutions are consistent with recent studies in the area.
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 South American Earth Sciences
ISSN
0895-9811
e-ISSN
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Volume of the periodical
71
Issue of the periodical within the volume
-
Country of publishing house
GB - UNITED KINGDOM
Number of pages
11
Pages from-to
359-369
UT code for WoS article
000385322400027
EID of the result in the Scopus database
2-s2.0-84955581395