A supermoon is the
coincidence of a full moon or a new moon with the closest approach the Moon
makes to the Earth on its elliptical orbit, resulting in the largest apparent
size of the lunar disk as seen from Earth. The technical name is the
perigee-syzygy of the Earth-Moon-Sun system. The term "supermoon" is
not astronomical, but originated in modern astrology. The association of the
Moon with both oceanic and crustal tides has led to claims that the supermoon
phenomenon may be associated with increased risk of events such as earthquakes
and volcanic eruptions, but the evidence of such a link is widely held to be
unconvincing.
The most recent occurrence
was on August 10, 2014. The next and closest supermoon of 2014 will be on
September 9.
The opposite phenomenon,
an apogee-syzygy, has been called a micromoon, though this term is not as
widespread as supermoon.
From: Wikipedia.
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