* Volcano eruption disrupts air travel
* 500 leave area near volcano, Red Cross
* Eruption could trigger powerful volcano
By Omar Valdimarsson
REYKJAVIK, March 21 (Reuters) - A volcano
erupted in the south of Iceland overnight, forcing hundreds of people to
evacuate the area and diverting flights after authorities declared a state
of emergency, officials said on Sunday.
Shortly before midnight, the Eyjafjallajokull
glacier, the island's fifth largest, started to spew smoke and lava from
several craters along a rift which is popular with hikers.