Seismological evidence for a discontinuity In subduction zones
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Resumen
La magnitud local media M es independiente del número anual de temblores, y puede servir para detectar cambios en los esfuerzos tectónicos regionales. Se examinan tres parámetros de estimación del tamaño medio de los temblores: la magnitud media M, el factor b (proporcional al recíproco de M) y el momento local medio M0. Este último es el único parámetro no sesgado. Al analizar la variación de b en ciertas zonas de. subducción se detectan cambios sistemáticos con la profundidad. La evidencia sugiere que las placas descendentes no tienen continuidad hasta profundidades de 600 km, con la excepción de la zona de subducción de Tonga-Kermadec que no demuestra mayores variaciones de b con la profundidad.
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ACHARYA, H., Magnitude-frequency relation and deep-focus earthqueakes, Bull. Seis. Soc. Am., 61, 1345, 1971. DOI: https://doi.org/10.1785/BSSA0610051345
BRUNE, J. N., Seismic moment, seismicity, and rate of slip along major fault zones, J. Geophys. Res., 73, 777, 1968. DOI: https://doi.org/10.1029/JB073i002p00777
BRUNE, J. N., Tectonic stress and the spectra of seismic shear waves from earthquakes, J. Geophys. Res., 75, 4997, 1970. DOI: https://doi.org/10.1029/JB075i026p04997
DUDA, S. J., Secular seismic energy release in the circum-Pacific belt, Tectonophysics, 2, 409, 1965. DOI: https://doi.org/10.1016/0040-1951(65)90035-1
EPSTÉIN, B., and C. LOMNITZ, A model for the ocurrence of large earthquakes, Nature, 211, 954, 1966. DOI: https://doi.org/10.1038/211954b0
EVERNDEN, J. F., Study of regional seismicity and associated problems, Bull. Seis. Soc. Am., 60, 393, 1970. DOI: https://doi.org/10.1785/BSSA0600020393
GUTENBERG, B., and C. F. RICHTER, Seismicity of the Earth and Associated Phenomena, (Princeton University Press, Princeton, New Jersey, 1954).
HAMADA, K., and T. HAGIWARA, High sensitivity tripartite observation of Matsushiro earthquakes, Part 4, Bull. Earthq. Res. Inst., 45, 159, 1967.
HAMILTON, R. M., The Fiordland earthquake sequence of 1960 and seismic velocities beneath New Zealand, N. Z.J. Geol. Geophys., 9, 224, 1966. DOI: https://doi.org/10.1080/00288306.1966.10422811
HANKS, T. C., and M. WYSS, The use of body wave spectra in the determination of seismic source parameters, Bull. Seis. Soc. Am., 62,561-589, 1972. DOI: https://doi.org/10.1785/BSSA0620020561
ISACKS, B., and P. MOLNAR, Distribution of stresses in the descending lithosphere from a global survey of focal mechanism solutions of mantle earthquakes, Reviews Geophys. Space Phys. 9, 103, 1971. DOI: https://doi.org/10.1029/RG009i001p00103
ISHIMOTO, M., and K. IIDA, Observations sur les séismes enregistrés par le microsismographe construit dernièrement, Bull. Earthq. Res. Inst., 17, 443, 1939.
KARNIK, V., Magnitude, frequency · and energy of earthquakes in the European area, Trans. Inst. Geophys. Acad. Czechosl. Sci., 65, 247, 1965.
LOMNITZ, C., A study of the Maipo Valley earthquakes of September 4, 1958, Proc. 2nd Conf. Earthq. Eng'g, Tokyo, 1, 501, 1960.
LOMNITZ, C., On thermodynamics of planets, J. Geophys., 5, 157, 1961. DOI: https://doi.org/10.1111/j.1365-246X.1961.tb00419.x
LOMNITZ, C., Statistical prediction of earthquakes, Reviews Geophys., 4, 377, 1966a. DOI: https://doi.org/10.1029/RG004i003p00377
LOMNITZ, C., Magnitude stability in earthquake sequences, Bull. Seis. Soc. Am., 56, 247, 1966b. DOI: https://doi.org/10.1785/BSSA0560010247
LOMNITZ, C., and A. HAX, Clustering in aftershock sequences, in The Earth Beneath the Continents, Geophys. Monograph 10, AGU, 502, 1966. DOI: https://doi.org/10.1029/GM010p0502
MATHERON, G., La théórie des variables régionalisées et ses applications, Centre Morphol. Math. Fontainebleau, 5, 211 pp, 1970.
MIYAMURA, S., Magnitude-frequency relation of earthquakes and its bearing on geotectonics, Proc. Jap. Acad. Sci., 38, 27, 1962. DOI: https://doi.org/10.2183/pjab1945.38.27
MOLNAR, P., and M. WYSS, Moments, source dimensions, and stress drops of shallow-focus earthquakes in the Tonga-Kermadec Arc. Phys. Earth Planet. Inter., in press, 1973. DOI: https://doi.org/10.1016/0031-9201(72)90010-6
SCHOLZ, C. H., The frecuency-magnitude relation of microfracturing in rock and its relation to earthquakes; Bull. Seis. Soc, Am., 58, 399, 1968. DOI: https://doi.org/10.1785/BSSA0580010399
SUYEHIRO, S., Difference between aftershocks and foreshocks in the relationship of magnitude to frequency of occurrence for the great Chilean earthquake of 1960, Bull. Seis. Soc. Am., 56, 185, 1966. DOI: https://doi.org/10.1785/BSSA0560010185
WYSS, M., Stress estimates for South American shallow and deep earthquakes, J. Geophys. Res., 75, 1529, 1970. DOI: https://doi.org/10.1029/JB075i008p01529
WYSS, M., and T. C. HANKS, The source parameters of the San Fernando earthquake inferred from teleseismic body waves, Bull. Seis. Soc. Am., 62, 591-602, 1972.
WYSS, M., and MOLNAR, Source parameters of intermediate and deep-focus earthquakes in the Tonga Arc, Physics of the Solid Earth, in press, 1973. DOI: https://doi.org/10.1016/0031-9201(72)90011-8
