| Summary: | Gravity, ground tilt and strain changes due to a uniform rise of sea water of 1 m withineach of ten parts of the worldwide oceans have been calculated for six stations in Japan inorder to get a limit of the oceanic effects and an estimate of errors in the calculation of theeffects on earth tidal observations. The effects from distant oceans such as the Atlantic andIndian Ocean are remarkable on the gravity change in Japan. The Atlantic and IndianOcean and the farthermost part of the Pacific Ocean do not cause any significant influenceson the ground tilts. As to the strain the uniform rise of water in the Atlantic and IndianOcean generates an areal contraction and dilatation of about 2x10-9, respectively. The effectof the Okhotsk Sea is negligibly small in the southern part of Japan, and that of the EastChina Sea and Seto Naikai is small in the northern part. Gravity, ground tilt and strain changes due to a uniform rise of sea water of 1 m withineach of ten parts of the worldwide oceans have been calculated for six stations in Japan inorder to get a limit of the oceanic effects and an estimate of errors in the calculation of theeffects on earth tidal observations. The effects from distant oceans such as the Atlantic andIndian Ocean are remarkable on the gravity change in Japan. The Atlantic and IndianOcean and the farthermost part of the Pacific Ocean do not cause any significant influenceson the ground tilts. As to the strain the uniform rise of water in the Atlantic and IndianOcean generates an areal contraction and dilatation of about 2x10-9, respectively. The effectof the Okhotsk Sea is negligibly small in the southern part of Japan, and that of the EastChina Sea and Seto Naikai is small in the northern part.
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