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Reliability of Pacific Seismological Stations

Abstract

IN a former paper I gave a comparison of the accuracies of seismological stations, based on the residuals for P in the International Seismological Summary1. The fraction of the residuals between ±4s was taken as the standard and called the reliability. It came out rather low for most of the Pacific stations, though I suggested that the estimates might be too low, on account of errors in the epicentres due to too little weight having been given to the near stations. In some work on southern earthquakes, preparatory to a further study of the core waves, I have re-determined a large number of Pacific epicentres (up to the end of 1931), taking into account the effects of the ellipticity of the earth; the result is a great improvement in the reliabilities. They are now as follows:

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References

  1. Mon. Not. Roy. Ast. Soc., Geophys. Supp., 3, 423–443 (1936).

  2. Mon. Not. Roy. Ast. Soc., Geophys. Supp., 4, 143–157 (1937).

  3. Bur. Centr. Seism. Trav. Sci., 11 (1935).

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JEFFREYS, H. Reliability of Pacific Seismological Stations. Nature 140, 237–238 (1937). https://doi.org/10.1038/140237b0

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