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pure and applied geophysics

, Volume 132, Issue 1–2, pp 311–329 | Cite as

Seismicity and codaQ values in the eastern Pyrenees: First results from the La Cerdanya seismic network

  • Antoni M. Correig
  • Brian J. Mitchell
  • Ramon Ortiz
Article

Abstract

Seismicity in the La Cerdanya region of the eastern Pyrenees has been accurately mapped for the first time using data from a local seismic network. The majority of earthquakes lies on or near the La Cerdanya fault or secondary faults to the south. Coda magnitudes determined for these earthquakes, using magnitude relations from other regions, range between −0.5 and 2.2. These are, however, presumed to be underdetermined values sinceQ values appear to be very low in the La Cerdanya region. CodaQ values at a frequency of 1.5 Hz range between 17 and 120, the lowest values being obtained for the most seismically active regions. CodaQ values also increase with increasing distance, a result which indicates decreasing seismic attenuation with increasing depth in the crust.

Key words

Seismicity codaQ Q variations 

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References

  1. Aki, K. (1969),Analysis of the Seismic Coda of Local Earthquakes as Scattered Waves, J. Geophys. Res.74, 615–631.Google Scholar
  2. Aki, K., andChouet, B. (1975),Origin of Coda Waves: Source, Attenuation, and Scattering Effects, J. Geophys. Res.80, 3322–3342.Google Scholar
  3. Banda, E., andCorreig, A. M. (1984),The Catalan Earthquake of February 2, 1428, Engineering Geology20, 89–97.Google Scholar
  4. Boillot, G., andCapdevila, R. (1977),The Pyrenees: Subduction or Collision?, Earth Planet. Sci. Lett.35, 151–160.Google Scholar
  5. Bureau de Recherche Géologiques et Minières (BRGM) (1983),Seismicite historique, Fichier informatise “SIRENE”.Google Scholar
  6. Choucroune, P., andMattauer, M. (1978),Tectonique des plaques et Pyrenées: sur le fonctionnement de la faille transformant nord-pyrénéenne et comparaisons avec des modèles actuels, Bull. Soc. Géol. France.7, XX, 5, 689–700.Google Scholar
  7. Correig, A. M. (1982),Estudio de algunos terremotos historicos, In:La sismicidad en la zona comprendida entre 40°N–44°N y 3°W–5°E en la Peninsula Iberica, Catedra de Geofisica, Universidad Complutense, Madrid, 107–117.Google Scholar
  8. Daignieres, M., Gallart, J., Banda, E., andHirn, A. (1982),Implications of the Seismic Structure for the Orogenic Evolution of the Pyrenean Range, Earth Planet. Sci. Lett.57, 88–100.Google Scholar
  9. Dewey, J. F., Pitman, W. C., Ryan, W. B. F., andBonin, J. (1973),Plate Tectonics and Evolution of the Alpine System, Geol. Soc. Am. Bull.84, 3137.Google Scholar
  10. Fisher, R. A., andYates, F.,Statistical Tables for Biological, Agricultural and Medical Research (Hafner, Darien, Conn. 1970) pp. 1–146.Google Scholar
  11. Gagnepain-Beyneix, J., Haessler, H., andModiano, T. (1982),The Pyrenean Earthquake of February 29, 1980: An Example of Complex Faulting, Tectonophysics85, 273–290.Google Scholar
  12. Gallart, J., Daignieres, M., Gagnepain-Beyneix, J., Hirn, A., andOlivera, C. (1985a),Seismostructural Studies in the Pyrenees: Evolution and Recent Results, Pure Appl. Geophys.122, 713–724.Google Scholar
  13. Gallart, J., Olivera, C., andCorreig, A. M. (1985b),Reconocimiento sismico de La Cerdanya (Pirineos orientales). Primeros resultados, Rev. Geofis.41, 81–90.Google Scholar
  14. Herrmann, R. (1980),Q Estimates Using the Coda of Local Earthquakes, Bull. Seismol. Soc. Am.70, 447–468.Google Scholar
  15. Le Pichon, X., Bonnin, J., andSibuet, J. C. (1970),La faille nord-pyrénéenne: faille transformant liée à l'ouverture du Golfe de Gascogne, C. R. Acad. Sci. Paris271, 1941.Google Scholar
  16. Lee, W. H. K., Bennet, R. E., andMeagher, K. L. (1972),A Method of Estimating Magnitude of Local Earthquakes from Signal Duration, Geol. Surv. Open-File Rep. (U.S.)28.Google Scholar
  17. Liener, B. A., Frazer, L. N., andRudman, A. J. (1986),Evaluation of seismometer arrays for earthquake location, InGeophysical Computer Program 11, Geological Survey occasional paper52 (Department of Natural Resources, Bloomington, Indiana).Google Scholar
  18. Mezcua, J., andMartinez Solares, J. M. (1983),Sismicidad del area Ibero-Mogrebi, Instituto Geografico Nacional, Publ.203, Madrid.Google Scholar
  19. Mendoza, J., andMorgan, D. (1985),BASIC-HYPO: A Basic Language Hypocenter Location Program User's Guide (Stanford University).Google Scholar
  20. Olivera, C.,Estudis de sismicitat i sismotectonica local. Aplicació als Pirineus (Ph.D. Thesis, University of Barcelona 1983), 263 pp.Google Scholar
  21. Olivera, C., Gallart, J., Goula, X., andBanda, E. (1986),Recent Activity and Seismotectonics of the Eastern Pyrenees, Tectonophysics129, 367–380.Google Scholar
  22. Peng, J. Y., Aki, K., Chouet, B., Johnson, P., Lee, W. H. K., Marks, S., Newberry, J. T., Ryall, A. S., Stewart, S. W., andTottingham, D. M. (1987),Temporal Change in Coda Q Associated with the Round Valley, California, Earthquake of November 23, 1984, J. Geophys. Res.92, 3507–3526.Google Scholar
  23. Pujades, L. Distribució de “Q” de coda a la Peninsula Iberica (Ph.D. Thesis, Universitat de Barcelona 1987).Google Scholar
  24. Pulli, J. (1984),Attenuation of Coda Waves in New England, Bull. Seism. Soc. Am.74, 1149–1166.Google Scholar
  25. Roeckner, S. V., Tucker, B., King, andHatzfeld, D. (1982),Estimates of Q in Central Asia as a Function of Frequency and Depth Using the Coda of Locally Recorded Earthquakes, Bull. Seismol. Soc. Am.72, 129–149.Google Scholar
  26. Sato, H. (1977),Energy Propagation Including Scattering Effects: Single Isotropic Scattering Approximation, J. Phys. Earth.25, 27–41.Google Scholar
  27. Souquet, P., Peybernes, B., Billotte, M., andDebroas, E. J. (1977),La chaine Alpine del Pyrenees, Geol. Alpine53, 196.Google Scholar
  28. Surinach, E., andRoca, A.,Catalogo de terremotos de Catalunya, Pirineos y zonas adyacentes, InLa sismicidad de la zona comprendida entre 40°N–44°N y 3°W–5°E en la Peninsula Iberica (Catedra de Geofisica de la Universidad Complutense, Madrid 1982) pp. 9–106.Google Scholar
  29. Udias, A., Lopez-Arroyo, A., andMezcua, J. (1976),Seismotectonics of the Azores-Alboran Region, Tectonophysics31, 259–289.Google Scholar

Copyright information

© Birkhäuser Verlag 1990

Authors and Affiliations

  • Antoni M. Correig
    • 1
    • 3
  • Brian J. Mitchell
    • 2
  • Ramon Ortiz
    • 1
    • 4
  1. 1.Laboratori d'Estudis Geofisics “Eduard Fontseré,” Institut d'Estudis CatalansFacultat de FisicaBarcelonaSpain
  2. 2.Department of Earth and Atmospheric SciencesSaint Louis UniversitySaint LouisUSA
  3. 3.Department de Geologia Dinamica, Geofisica i Paleontologia, Facultat de FisicaUniversitat de BarcelonaBarcelonaSpain
  4. 4.Museo Nacional de Ciencias NaturalesCSIC, Departamento de GeologiaMadridSpain

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