Spring tides occur twice each lunar month, at new moon and at full moon. At these times, the sun, moon and Earth are nearly aligned, which increases gravitational pull on the oceans and results in higher-than-average hig... More »

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Spring tides occur twice a month during the full and new moons. Spring tides are the result of the alignment of the Sun, Moon and Earth and the effects of their gravitational forces. Spring tides are also high tides. More »

Ocean tides are caused by the gravitational pull of the Moon and Sun. Due to the rotation of the Earth, locations will experience two high and two low tides each day. An alignment of the Sun and Moon will result in more ... More »

The difference between spring and neap tides is that spring tides are much higher than normal and neap tides are lower than normal. Spring tides occur because of the combined effects of the sun and moon, whereas neap tid... More »

Every 24 hours and 50 minutes, the Earth experiences two high tides and two low tides. High tides occur every 12 hours and 25 minutes. From high tide to low tide is a span of six hours and 12.5 minutes. More »

A black moon describes either the second new moon of a calendar month, a calendar month without a new moon, a calendar month without a full moon, or the third new moon of a season that has four new moons. More »

Neap tides, moderate tides resulting from the gravitational forces of the sun and moon partly canceling out, happen twice every lunar month. A neap tide happens exactly half-way between a full moon and a new moon. More »