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Pictured above during the second eruption, lightning bolts illuminate ash pouring out of the Eyjafjallajökull volcano. Astronomy Picture of the Day 2012 August 11 Spiral Galaxy NGC 4038 in Collision Image Credit: Data Collection: Hubble Legacy Archive; Processing: Danny Lee Russell


Weather pictures of the year 2011: lightning, auroras, snow and ice

Volcanic lightning bolts form in the ash plume during the eruption of the volcano in southern Chile Picture: EPA

The Tlikakila River flows into Alaska's Lake Clark carrying ash from Iliamna, one of two volcanoes in Lake Clark National Park and Preserve. Photographer: Michael Melford, NatGeo