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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

  • Czech description

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

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

  • 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