Abstract
DURING January 1940 thirteen earthquakes were well registered by the seismographs at Kew Observatory. The largest of these were on January 6 at 14h. 23m. 2s. and January 17 at lh. 33m. 24s., though a doubtful phase preceded this at 29m. 35s. This latter shock was registered at De Bilt (Holland) at 33m. 16s. G.C.T., and the shock of January 26 was also well observed there. The United States Coast and Geodetic Survey in co-operation with Science Service and the Jesuit Seismological Association has determined the epicentre of the earthquake of January 6 to have been lat. 22° S., long. 170° E. with initial time 14h. 3·4m. G.C.T. This determination was based on observations of seismograms obtained at Georgetown, Sitka, Apia, Honolulu, Pasadena, Fordham, San Juan and Manila. The provisional epicentre was in a well-known seismic zone of the Pacific Ocean to the east of the island of New Caledonia. The earthquake of January 17 was found by the same authority on the basis of reports from nineteen observatories to have been provisionally centred at lat. 17° N., long. 148° E., and to have had, initial time lh. 14m. 53s. G.C.T. This epicentre was in the Pacific Ocean to the east of Zealandia Bank (Marianas Islands).
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January Earthquakes Registered at Kew. Nature 145, 301–302 (1940). https://doi.org/10.1038/145301d0
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DOI: https://doi.org/10.1038/145301d0