Estudio del factor anelástico Q de la coda de los terremotos correspondientes a las regiones central y oriental del Eje Volcánico de México
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Abstract
Using the coda of several earthquakes situated in Central and Oriental regions of the Volcanic Axis of Mexico, and recorded in the OXM seismographic station of the Servicio Sismológico Nacional, the foil m\ mg results have been obtained: a) Q is strongly frequency dependent in the form Q• Q0(f' f0)u, being the values of u• 0.4 for the Central re-gion and 0.6 for the Oriental one, "here f varies between 0.6 Hz and 1.0 Hz. b) Thc values of Q0 obtained for a reference freq uency of f0 • 1 llz are 322 fo r the Central region and 129 for the Oriental one. e) The 5-wave attenuation coefficients obtained are 0.0023 km-1 and 0.0102 km-1 for thc Central and Oricn· tal parts respectivcly. d) The coda excitation coefficients obtained are 3.56 x 10-25cm ~ dyne cm fo r thc Central rcg10n and 1.85 x ttf"cm s/dyne cm for the Oriental one. The above results may indica te a higher degree of faulting and/or a higher concentration of magmauc cham· bers under the Oriental region than under the Central one.
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References
AKI, K., 1969. Analysis of the seismic coda of local earthquakes as scattered waves. J. Geophys. Res., 74, 615-631. DOI: https://doi.org/10.1029/JB074i002p00615
AKI, K., 1980. Scattering and attenuation of shear waves in the lithosphere. J. Geophys. Res., 85, 6496-6504. DOI: https://doi.org/10.1029/JB085iB11p06496
ALSUP, S. A., 1972. Estimation of upper mantle Q beneath the United States from Pn amplitudes. Ph. D. Thesis, The George Washington University, Washington, D. C.
CANAS, J. A., 1982. Variation of Coda-Q in southern Mexico. American Geophysical Union. Diciembre 1982, San Francisco.
DER, Z. A., and T. W. McELFRESH, 1977. The relationship between anelastic attenuation and regional amplitude anomalies of short-period P waves in North America, Bull. Seism. Soc. Am., 67, 1303-1317.
DIMENT, W. H., T. C. URBAN, and F. A. REVETT A, 1972. Some geophysical anomalies in the eastern United States. The Nature of the Solid Earth, edited by E. C. Robertson, McGraw-Hill, New York, 506-543.
EVERDEN, J. F., 1975. Seismic intensities, "size" of earthquakes and related parameters, Bull. Seism. Soc. Am., 65, 1287-1313. DOI: https://doi.org/10.1785/BSSA0650051287
GOEL, S. K., 1973. Seismic wave attenuation, intensity and magnitude relation for Rocky mountains, M. S. Thesis, Saint Louis University, St. Louis, Mo.
HERRAIZ, M., 1981. Microsismicidad en el campo próximo, análisis de generación de ondas coda y parámetros físicos asociados. Tesis Doctoral, Universidad Complutense de Madrid, Madrid.
HERRMANN, R. B., 1980. Q estimates using the coda of local earthquakes. Bull. Seism. Soc. Am., 70, 447-468. DOI: https://doi.org/10.1785/BSSA0700020447
LACHENBRUCH, A. H., 1979. Heat flow and tectonic studies, in Summary of Technical Reports, Vol. IX, Open file report, 80-6, U. S. Geological Survey, Menlo Park, Ca, 211.
MALONE, S. D., and S. S. BOR (1979). Attenuation patterns in the Pacific north-west based on intensity data and the location of the 1872 North Cascades earthquake, Bull. Seism. Soc. Am., 69, 531-546. DOI: https://doi.org/10.1785/BSSA0690020531
MITCHELL, B. J., 1970. Electrical and seismic properties of the Earth's crust in the southwestern Great Plains, Ph. D. Thesis, Southern Methodist University, TX.
MITCHELL, B. J., and M. LANDISMAN, 1971. Electrical and seismic properties of the Earth's crust in the southwestern Great Plains of the United States, Geophysics, 36, 363-381. DOI: https://doi.org/10.1190/1.1440176
NUTTLI, O. W., 1974. Seismic hazard east of the Rocky mountains, ASCE National Structural Engineering Meeting, Cincinnati, Ohio, April, 22-26.
NUTTLI, O. W., 1980. The excitation and attenuation of seismic crustal phases in Iran, Bull. Seism. Soc. Am., 70, 469-485. DOI: https://doi.org/10.1785/BSSA0700020469
NUTTLI, O. W., G. A. BOLLINGER, and D. W. GRIFFITHS, 1979. On the relation between Modified Mercalli intensity and body-wave magnitude, Bull. Seism. Soc. Am., 69, 893-909. DOI: https://doi.org/10.1785/BSSA0690030893
REITZEL, J. S., D. I. GOUGH, H. PORATH, and C. W. ANDERSON III, 1970. Geomagnetic deep sounding and upper mantle structure in western United States, Geophys. J., 19, 213-235. DOI: https://doi.org/10.1111/j.1365-246X.1970.tb06044.x
SINGH, S, 1981. Regionalization of crustal Q in the continental United States, Ph. D. Thesis, Saint Louis University, Saint Louis, Mo.
SOLOMON, S. C., 1972. Seismic wave attenuation and partial melting in the upper mantle of North America, J. Geophys. Res., 77, 1483-1502. DOI: https://doi.org/10.1029/JB077i008p01483
STREET, R. L., and A. LACROIX, 1979. An empirical study of New England seismicity: 1727-1977, Bull. Seism. Soc. Am., 69, 159-175. DOI: https://doi.org/10.1785/BSSA0690010159
UDIAS, A., 1980. Deep seismic sounding studies in Spain in Spanish Commission on the Geodynamics Project, 43-58. Consejo Superior de Investigaciones Científicas, Madrid.