Due to the Moon Illusion and the a "supermoon" it created a large moon in the sky and the closest the moon has been to earth in 18 years. Further information can be found in the links below:

http://blogs.discovermagazine.com/badastronomy/2011/03/18/kryptonite-for-the-supermoon/

http://blogs.discovermagazine.com/badastronomy/2010/05/13/why-does-the-moon-look-so-huge-on-the-horizon/