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.