Sky gazers around the world are congregating near landmarks, on beaches and atop tall buildings to take a look.
The 'supermoon' reached its brightest in Asia on Monday evening.
The Moon was closest - only 221,524 miles (356,509km) away - at 11:21 GMT.
The moon orbits the Earth in an ellipse, not a circle, so it is sometimes closer to the Earth than it is at other times.
When the perigee - the closest approach - and the full moon coincide, it is known as a supermoon.