Large earthquakes in southern California with epicentres between 33 and 36° N have statistically significant 12-hourly, lunar fortnightly and 18.6-yr periodicities. Smaller earthquakes in the same region do not display these periodicities. A search for tidal effects associated with these periodicities shows that large earthquakes have significant correlations with the times and orientations of daily/semi-daily tidal stresses while the lunar fornightly term is associated with the ocean tides along the southern Californian coast.
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Tamrazyan, G. P. Icarus 7, 59–65, (1967); 9 (1968), 574–592.
Van Ruymbeke, M., Ducarme, B. & deBecker, M. Proc. 9th int. Symp. on Earth Tides, (Schweizerbart'sche, Stuttgart, 1983).
Davison, C. Studies on the Periodicity of Earthquakes (Murby, London, 1938).
Knopoff, L. Int. J. lunar Stud. 1, 140–143 (1970).
Jeffreys, H. Gerl. Beitr. Geophys. 53, 111–139 (1938).
Lomnitz, C. Rev. Geophys. 4, 377–393 (1966).
Knopoff, L. Bull. seismol. Soc. Am. 54, 1865–1870 (1964).
McNutt, M. & Heaton, T. H. California Geology 12–16 (January, 1981).
Young, D. & Zurn, W. J. Geophys. 45, 171–182 (1979).
Knopoff, L. & Gardner, J. K. Geophys. J. R. astr. Soc. 28, 311–313 (1972).
Knopoff, L. Interdisciplinary Symp., 16th General Assembly, Grenoble, 205 (International Union of Geodesy and Geophysics, 1975).
Klein, F. W. Geophys. J. R. astr. Soc. 45, 245–295 (1976).
Heaton, T. H. Geophys. J. R. astr. Soc. 43, 307–326 (1975).
Allen, M. W. Bull. seismol. Soc. Am. 26, 147–157 (1936).
Nordquist, J. M. Bull. seismol. Soc. Am. 54, 1003–1011 (1964).
Hileman, J. A., Allen, C. R. & Nordquist, J. M. Seismicity of the Southern California Region, 1 January 1932 to 31 December 1972 (Seismology Laboratory, California Institute of Technology, 1973).
Friedman, M. E., Whitcomb, J. H., Allen, C. R. & Hileman, J.A. Seismicity of the Southern California Region, 1 January 1973 to 31 December 1974. (Seismology Laboratory, California Institute of Technology, 1976).
Coffman, J. L. & vonHake, C. A. (eds) Earthquake History of the United States (National Oceanic and Atmospheric Administration, Publ. 41-1, 1973).
Wood, F.J. The Strategic Role of Perigean Spring Tides (National Oceanic and Atmospheric Administration, 1976).
Lewis, T. A. W. J. Sound Vib. 12, 353–375 (1970).
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Kilston, S., Knopoff, L. Lunar–solar periodicities of large earthquakes in southern California. Nature 304, 21–25 (1983). https://doi.org/10.1038/304021a0
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