A super blue moon occurs roughly once every 10 years, though it can sometimes be as infrequent as every 20 years. The next super blue moons after recent occurrences are expected in 2037. A super blue moon happens when a supermoon (the full moon is at or near its closest point to Earth) coincides with a blue moon, which can either be a second full moon in a single month or the third of four full moons in a single season.
