St. Elmo's Fire
A luminous, and often audible, electric discharge that is
sporadic in nature. It occurs from objects, especially pointed
ones, when the electrical field strength near their surfaces
attains a value near 1000 volts per centimeter. It often occurs
during stormy weather and might be seen on a ship's mast or
yardarm, aircraft, lightning rods, and steeples. Also known as
corposant or corona discharge.