Tides that occur at FULL moon and NEW moon (when S-E-M are lined up) are called what?
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Several times a year, the Full Moon or New Moon happens as the Moon is around its closest point to Earth, called perigee. This is popularly known as a Supermoon and leads to even larger variation between high and low tides, known as perigean spring tides. However, the difference from a normal spring tide is only around 5 cm or 2 inches.
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