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 most recent supermoon was seen yesterday on November 14, 2016, which was the closest to Earth since January 26, 1948. The next one like this will not occur until November 25, 2034.
Here's what this apparent size change looks like over the course of the year:
Beijing, China
Glastonbury, England
New York, New York
Hanau, Germany
Beijing, China
London, England
Baikonur, Kazakhstan
Cordoba, Spain
Gauhati, India
London, England
Sydney, Australia
Phoenix, Arizona
Cannon Ball, North Dakota
St. Louis, Missouri
South El Monte, California
New York, New York
Baikonur, Kazakhstan
Sapporo, Japan