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Validation of 3D Velocity Models Using Earthquakes with Shallow Slip: Case Study of the 2014 M-w 6.0 South Napa, California, Event

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F17%3A10366882" target="_blank" >RIV/00216208:11320/17:10366882 - isvavai.cz</a>

  • Result on the web

    <a href="http://dx.doi.org/10.1785/0120160041" target="_blank" >http://dx.doi.org/10.1785/0120160041</a>

  • DOI - Digital Object Identifier

    <a href="http://dx.doi.org/10.1785/0120160041" target="_blank" >10.1785/0120160041</a>

Alternative languages

  • Result language

    angličtina

  • Original language name

    Validation of 3D Velocity Models Using Earthquakes with Shallow Slip: Case Study of the 2014 M-w 6.0 South Napa, California, Event

  • Original language description

    3D velocity models constitute a key element in strong ground motion modeling, for example, earthquake-hazard assessment. Their validation is typically based on modeling weak earthquakes with foci limited to depths greater than similar to 5 km. However, ruptures during moderate and large earthquakes can propagate to shallower depths (and eventually reach the surface). For such shallow sources, velocity models may not be validated with sufficient accuracy. In this respect, we conduct a series of tests based on the 2014 M-w 6.0 South Napa earthquake, which was characterized by a very shallow slip asperity, to assess the performance of the U.S. Geological Survey 3D San Francisco Bay area velocity model within 20-km fault distance. Our study indicates that the velocity model performs generally well with some exceptions, in which large-amplitude surface waves not present in the observed data are systematically excited. We conclude that more complex fault geometries or slightly deeper slip would not result in a better fit of the observed data. Contrarily, we demonstrate that smoothing the velocity model (i.e., reducing the strong velocity contrasts between basin fill and bedrock) effectively attenuates the spurious oscillations.

  • 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

    10500 - Earth and related environmental sciences

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

    2017

  • Confidentiality

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

Data specific for result type

  • Name of the periodical

    Bulletin of the Seismological Society of America

  • ISSN

    0037-1106

  • e-ISSN

  • Volume of the periodical

    107

  • Issue of the periodical within the volume

    2

  • Country of publishing house

    US - UNITED STATES

  • Number of pages

    8

  • Pages from-to

    1019-1026

  • UT code for WoS article

    000402373000037

  • EID of the result in the Scopus database