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 June 23, 2013, as the closest and largest full moon of the year and the Moon's closest encounter with Earth for all of 2013.
It will not be so close again until August 10, 2014.
Supermoons occur about once every 14 full moons in a full moon cycle.
This short video was done in the evening of June 22nd, 2013.
Unfortunately weather conditions were not optimal for the same shooting on June 23rd.
[source: en.wikipedia.org/wiki/Supermoon]
The Earth-Moon distance is 'just' 356.991 km! Enjoy :)