Tides Tides are cyclic and harmonic rises and falls of large amount of water. Origin of tides is the gravitational force among the Earth and the Moon. The gravitational force of the moon attracts the oceans water in the path of the moon. Another attraction occurs on the contrary side, since the Earth is also being pulled toward the Moon. Since the earth is rotating while this is happening, two tides occur each day. Isaac Newton explained tides scientifically firstly. Spring tides occur throughout the complete moon and the new moon. Tides during spring are tough tides and it should be noted that they do not have anything to do with the season spring. They occur when the Earth, the Sun, and the Moon are in a row. The gravitational forces of the Moon and the Sun append to cause tides. The Proxigean Spring Tide is a uncommon, unusually high tide. This very high tide occurs when the moon is both unusually close to the Earth (at its closest perigee, called the proxigee) and in the New Moon stage (when the Moon is between the Sun and the Earth). The proxigean spring tide occurs at most once every 1.5 years  Neap Tides Neap tides are especially weak tides. They happen when the gravitational forces of the Moon and the Sun are at right angles to one another (with respect to the Earth). Neap tides occur during quarter moons.