Abstract
FOURTEEN earthquake shocks or earth tremors were registered on the seismographs at Kew during the month of October 1939. Four of these are reported to be very small, and some others have been confused by microseisms. The best seismograms obtained were for the earthquakes of October 10 and 17. That on October 10 had a probable epicentral distance of 88° from Kew and a depth of focus of 75 km. The earthquake of October 17 was again a deep focus shock, being thought provisionally from Kew records to have had a focal depth of about 150 km. It was probably situated in the Kew Hebrides and was strong enough to give a full complement of pulses, including ipPPP, a longitudinal body-wave reflected three times at the earth's surface, coming to the surface for the fourth time at Kew where it was registered.
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Earthquakes registered at Kew during October 1939. Nature 144, 904 (1939). https://doi.org/10.1038/144904b0
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DOI: https://doi.org/10.1038/144904b0