From Channel 3 Weather Blog- What this moon is called.

[Guest guest]

Thought this was interesting! :-)

3/19/11) Tonight's Supermoon

Worm, Crow, Crust, Sap & LentenThe Farmers' Almanac calls the full moon of March the Full Worm Moon - As the temperature begins to warm and the ground begins to thaw, earthworm casts appear, heralding the return of the robins. The more northern tribes knew this Moon as the Full Crow Moon, when the cawing of crows signaled the end of winter; or the Full Crust Moon, because the snow cover becomes crusted from thawing by day and freezing at night. The Full Sap Moon, marking the time of tapping maple trees, is another variation. To the settlers, it was also known as the Lenten Moon, and was considered to be the last full Moon of winter.

The moon’s orbit around the earth is oval; therefore, sometimes it’s close to the earth and sometimes it’s farther away. When it's closest in perigee the full moon is known as a Supermoon.The last time an Extreme Supermoon occurred was in March of 1993. Extreme Supermoons typically occur about once every eighteen years. The best time to view this rare event will be right after moonrise which will occur at 8:15 Saturday evening. This will be when the moon appears largest on the eastern horizon.

According to Mark , Lunar perigee will happen within an hour of the astronomical full Moon phase (full at 2:10 PM). True, this lunar perigee (closest point to Earth) will be the closest in 18 years, but only by the tiniest margin. The reality is that Saturday night's full Moon's diameter will be a scant 2% larger than last month's or next months. Absolutely undetectable visually.

Won't be any brighter, either. So don't fall for the hype or let me hear you talking about how it will appear 15% larger and 17% brighter. It simply isn't true.