The Worm Moon is the last full moon before the spring equinox. This is when worms start appearing on the ground. Full moons become supermoon's when the full moon phase of the cycle coincides with the closest point in the moon's elliptical orbit. This full moon will only be 222,081 miles from earth. The moon will rise tonight at 7:36 p.m. which is near the end of the super moon which will be at it's fullest during the mid day, but of course we can't see it then.