Iceland's eruptions could have global consequences

clipped from news.yahoo.com REYKJAVIK, Iceland – Blasts of lava and ash shot out of a volcano in southern Iceland on Monday and small tremors rocked the ground, a surge in activity that raised fears of a larger explosion at the nearby Katla volcano. Slideshow:Iceland's Eyjafjallajoku volcano erupts Play Video Video:Iceland evacuate resident after volcanic eruption AFP Play Video Video:Hundreds flee Icelandic volcano Reuters Scientists say history has proven that when the Eyjafjallajokull volcano erupts, Katla follows — the only question is how soon. And Katla, located under the massive Myrdalsjokull icecap, threatens disastrous flooding and explosive blasts when it blows. Several small tremors were felt early Monday, followed by spurts of lava and steam rocketing into the air. Iceland sits on a large volcanic hot spot in the Atlantic's mid-oceanic ridge. Eruptions, common throughout Iceland's history, are often triggered by seismic activity when the Earth's plates move

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