also significant diurnal, semi-annual, and fortnightly contributions.Though the gravitational force causing earth tides and ocean tides is the same, the responses are quite different.

Tide raising force

The larger of the periodic gravitational forces is from the Moon but that of the Sun is also important.The images here show lunar tidal force when the Moon appears directly over 30° N (or 30° S). This pattern remains fixed with the red area directed toward (or

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