"Illuminated and electrified by lightning, a roiling ash and gas plume rises over Chile's Puyehue volcano (map) Sunday.
There may be as many as three distinct types of volcanic lightning, volcanic seismologist Steve McNutt told National Geographic News in 2010.
Large, spectacular "natural fireworks" sometimes accompany eruptions, along with an intermediate type, which shoots up from a volcano's vents and reaches lengths of about 1.8 miles (3 kilometers), and finally bolts that can be as short as about three feet (one meter) long and last just a few milliseconds."
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