The last time the moon was this close to the Earth was in 1948.
The brightest moon in nearly 69 years will be lighting up the sky this week in a treat for star watchers around the globe.
And in Cairo, Egypt skywatchers witnessed as it rose in the eastern skies.
The Moon was closest - only 221,524 miles (356,509km) away - at 11:21 GMT. Supermoon is used to describe a full moon that occurs during the moon's closest point of orbit near Earth.
The supermoon - scientifically called perigee-syzygy - also created the optical illusion of a "low-hanging moon" effect, which made it's size comparable to those of earthy objects such as houses and monuments.
But if you were disappointed in what you saw when you looked up at the sky Monday night - a totally ordinary looking full moon - you probably weren't alone. About every 14th full moon is a supermoon, said University of Wisconsin astronomer Jim Lattis. When that happens, the moon appears larger and brighter. If you have binoculars or a small telescope, you can see so much more.
A similar event won't come around for another two decades or so, so make sure you look skyward tonight!
The moon's distance from Earth varies because it is in an egg-shaped, not circular, orbit around the planet. The difference between perigee (the closest it gets to the Earth) and apogee (the most distant point on its orbit) is actually only about 10 percent.
Monday's event is the biggest and best in a series of three supermoons. Besides November's, there was one on October 16 and there will be another on December 14, although neither are as close as this month's.