What is the supermoon?

     ?What is the supermoon

            Supermoon is a full or New moon that nearly coincides with perigee.

Perigee is the moon's closest point to the earth in its monthly orbit.
          This results in moon which appears larger than its usual size when observed from the earth. The technical name for the same is perigee syzygy which is roughly straight line configuration of earth, moon and the sun.

             some important information about supermoon. the term supermoon is attributed to astrologer Richard Nolle.
Out of the possible 12 or 13 full or new moons each year usually 3 or 4 may be classified as supermoons. 

              supermoons do not cause natural desasters like earthquake or volcanic eruptions but supermoons can cause larger than usual perigean spring tides. These tides are just few inches bigger than the normal tides.