Weather Tidbits: Blue Moon
It’s all about the blue moon in this Weather Tidbits. A blue moon is a phenomenon involving the appearance of an extra full moon within a given period of time. They occur on average about every 2.5 years. The blue moon is actually not blue, but can give off a blue appearance; which is likely due to the ash of a volcanic eruption. A blue moon is defined in two ways, seasonal or calendrical. A seasonal blue moon is the 3rd full moon of 4 full moons in an astronomical season. A calendrical or monthly blue moon is the 2nd full moon within a single calendar month.