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Estimation of the Intrinsic Absorption and Scattering Attenuation in Northeastern Venezuela (Southeastern Caribbean) Using Coda Waves

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Q of the Earth: Global, Regional, and Laboratory Studies

Part of the book series: Pageoph Topical Volumes ((PTV))

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Abstract

Northeastern Venezuela has been studied in terms of coda wave attenuation using seismograms from local earthquakes recorded by a temporary short-period seismic network. The studied area has been separated into two subregions in order to investigate lateral variations in the attenuation parameters. Coda-G −1 (Q −1 c ) has been obtained using the single-scattering theory. The contribution of the intrinsic absorption (Q −1 i ) and scattering (Q −1 s ) to total attenuation (Q −1 t ) has been estimated by means of a multiple lapse time window method, based on the hypothesis of multiple isotropic scattering with uniform distribution of scatterers. Results show significant spatial variations of attenuation: the estimates for intermediate depth events and for shallow events present major differences. This fact may be related to different tectonic characteristics that may be due to the presence of the Lesser Antilles subduction zone, because the intermediate depth seismic zone may be coincident with the southern continuation of the subducting slab under the arc.

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Authors and Affiliations

  1. Departament d’Enginyeria del Terreny i Cartogràfica. UPC-Jordi Girona Salgado, Universitat Politècnica de Catalunya, s/n, D-2, 08034, Barcelona, Spain

    Arantza Ugalde & Luis G. Pujades

  2. Instituto Geográfico Nacional, c/General Ibáñez de Ibero, 3, 28003, Madrid, Spain

    José Antonio Canas

  3. US Geological Survey, Box 25046, MS966, Denver, CO, 80225, USA

    Antonio Villaseñor

Authors
  1. Arantza Ugalde
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  2. Luis G. Pujades
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  3. José Antonio Canas
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  4. Antonio Villaseñor
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Editors and Affiliations

  1. Department of Earth and Atmospheric Sciences, Saint Louis University, St. Louis, Missouri, 63103, USA

    Brian J. Mitchell

  2. Department of Geology and Geophysics, University of California, Berkeley, Berkeley, California, 94720, USA

    Barbara Romanowicz

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© 1998 Springer Basel AG

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Ugalde, A., Pujades, L.G., Canas, J.A., Villaseñor, A. (1998). Estimation of the Intrinsic Absorption and Scattering Attenuation in Northeastern Venezuela (Southeastern Caribbean) Using Coda Waves. In: Mitchell, B.J., Romanowicz, B. (eds) Q of the Earth: Global, Regional, and Laboratory Studies. Pageoph Topical Volumes. Birkhäuser, Basel. https://doi.org/10.1007/978-3-0348-8711-3_21

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  • DOI: https://doi.org/10.1007/978-3-0348-8711-3_21

  • Publisher Name: Birkhäuser, Basel

  • Print ISBN: 978-3-7643-6049-8

  • Online ISBN: 978-3-0348-8711-3

  • eBook Packages: Springer Book Archive

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