Abstract
IN a note on the sea waves of the Japanese earthquake of March 2, 1933, which appeared in NATURE of July 8, it is stated that “it was clear” that the waves would travel 3,950 miles—presumably sea ones—in about 8½ hours. It is understood that this calculation is based on the assumption that the waves must be long ones, so that they would conform with the formula v2=gd, and progress with a speed independent of period or length, the mean depth of water being the sole relevant factor. The time of arrival of the waves indicates that this assumption is probably correct, but nevertheless it might be interesting if those in a position to anticipate the arrival of waves of this sort were to time their periods. So far as I know, but little has been published about the character of sea waves generated by earthquakes. If the periods were observed, especially when the seismograph only indicates a single severe shock, in which case the original disturbance should presumably consist of one solitary wave, comparison of the actual with the theoretical periods should give a good indication as to the accuracy with which hydrodynamical theory works out in practice.
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UNNA, P. Seismic Sea Waves. Nature 132, 447 (1933). https://doi.org/10.1038/132447c0
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DOI: https://doi.org/10.1038/132447c0
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