The super worm moon coincides with the spring equinox, when the length of day and night are almost the same.
According to National Geographic, the names for full moons often come from traditional Native American tribes. The super worm moon’s name was chosen as worms are said to emerge from the soil around the time of the spring equinox.The coincidence of a full moon with the spring equinox is rare. This year’s super worm moon is the closest to the spring equinox since 2000. In the image above, the super worm moon can be seen rising over the Angel of Independence monument in Mexico City.
Supermoons occur when the Moon is closest to the Earth, making it appear bigger and brighter than normal. This image (above) shows the phenomenon above the New York skyline.