Abstract
MAY I be allowed to call attention to the fact that Alsace lies on the direction of the great circle, “boundary of Tertiary formation of the United States,” mentioned in my letter which appeared in your number of the 14th inst. (p. 570), and furthermore that Strasburg has been repeatedly shaken since 1355, the first date which I found recorded as having been marked by a shock. It is quite true that the interval between that shock and the next recorded (1556) was 201 years; but the greatest subsequent interval, that between the shocks of 1577 and 1655, was only of 78 years. This interval represents a multiple of 13, being = 13 × 6. The interval of 13 is of frequent recurrence, as I purpose to show in a paper which I have about terminated on this question of intervals and periods of earthquakes.
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O'REILLY, J. The Earthquake of October 16 in the Vosges, &c. Nature 34, 618 (1886). https://doi.org/10.1038/034618b0
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DOI: https://doi.org/10.1038/034618b0
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