Volcanoes Gallery

Lightning streaks across the sky as lava flows from a volcano in Eyjafjallajokul

Lightning streaks across the sky as lava flows from a volcano in Eyjafjallajokul April 17, 2010. An Icelandic volcano that is spewing ash into the air and wreaking havoc on flights across Europe appeared to be easing up on Saturday but could continue to erupt for days or even months to come, officials said. REUTERS/Lucas Jackson (ICELAND - Tags: DISASTER ENVIRONMENT IMAGES OF THE DAY)

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Smoke rises from Mount Semeru (back, centre) as seen from Pananjakan in the district of Pasuruan in East Java province in this September 16, 2008 file photo. Indonesia has raised to maximum its alert on the Mount Semeru volcano in East Java, warning of potentially dangerous lava flows, an official at the country's vulcanology centre said on March 7, 2009. Picture taken September 16, 2008. REUTERS/Sigit Pamungkas (INDONESIA ENVIRONMENT DISASTER)

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A horse stands in a field as volcanic ash and steam rise from Iceland's Eyjafjallajokull volcano April 21, 2010. The Icelandic volcano which grounded air traffic over Europe is still erupting, but it is spewing less ash, the meteorological office and experts said on Wednesday. Close monitoring of the neighbouring and potentially more dangerous Katla volcano was also taking place, but there have been no signs it has re-awakened, they added. REUTERS/Lucas Jackson (ICELAND - Tags: DISASTER ENVIRONMENT)