Abstract
Group velocities of both Rayleigh and Love waves travelling the Pacific Ocean were determined in the period range 30-180 seconds. The dispersion data show that Rayleigh wave for the north Pacific has considerably high group velocities in comparison with those for the south Pacific. Love wave, however, shows no big difference between the dispersion characteristics for the two different paths. For the interpretation of the dispersion in the south Pacific small anisotropy in the low velocity layer seems to be desirable. The oceanic models previously proposed by SAITO and TAKEUCHI from the group velocity study of comparatively short periods are examined and the property in the longer period range is discussed.
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