Merapi Volcano Erupted (VIDEO)

Indonesia's volcano Merapi, one of the world's most active volcanoes, erupted today. Clouds of grey ash reached 2 km height.

Authorities did not raise the rumbling volcano's alert status after the early-morning eruption, but they advised commercial planes to take caution in the area, Darik News reported.

Volcanic ash rained down on a 10sq km area, according to the Volcanology and Geological Hazard Mitigation Centre.