The second full moon of the calendar month will reach its full moon phase at its closest point to Earth on Wednesday night.
If there is more than one full moon in a given month or more than three full moons in a given season, then it is considered a "blue moon" by NASA.
Every couple of years, on average, one will occur.Meanwhile, a supermoon happens when the moon is in full phase at its orbit's perigee, or closest point to Earth.
Due to its closeness to Earth, the Moon seems roughly 14% bigger than it does during the furthest point of its orbit, or apogee.
According to NASA, 24% of full moons are considered "supermoons," but just 3% are blue moons. The next super blue moon following Wednesday's is not predicted until 2037.
Astronomer Tom Kerss told Forbes that the best time to see a full moon is just after sunset, when it is low in the horizon and seems a rich orange colour.
At 7:36 p.m. Pacific time, West Coast watchers may expect the super blue moon to be at its brightest.