A search for long-term periodicities in large earthquakes of southern and coastal central California

Details A search for long-term periodicities in large earthquakes of southern and coastal central California A search for long-term periodicities in large earthquakes of southern and coastal central California

Oct 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990georl..17.1981s&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 17, Oct. 1990, p. 1981-1984.

Physics

2

California, Earthquakes, Long Term Effects, Solar Activity, Solar Terrestrial Interactions, Periodic Variations, Seismology, Tectonics, Tides

Scientific paper

It has been occasionally suggested that large earthquakes may follow the 8.85-year and 18.6-year lunar-solar tidal cycles and possibly the approximately 11-year solar activity cycle. From a new study of earthquakes with magnitudes greater than 5.5 in southern and coastal central California during the years 1855-1983, it is concluded that, at least in this selected area of the world, no statistically significant long-term periodicities in earthquake frequency occur. The sample size used is about twice that used in comparable earlier studies of this region, which concentrated on large earthquakes.

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