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Rock Slab Growing at Mt. St. Helens Volcano

A new rock slab is growing at more than one meter a day on the Mt. St. Helens volcano in WashingtonUSA. The rock slab, growing since last November, now extends about 100 meters out from one of the volcano’s craters. A recently made time lapse movie shows the rock slab growing. Pictured above, a helicopter examines the steaming hot rock slab late last month. Mt. St. Helens underwent aspectacular eruption in 1980 but has been undergoing a comparatively serene eruption since 2004 September. A new volcanic dome has been building which is now about 100 meters above the 1980s dome. The rock slab is visible from the Johnston Ridge Observatory on the erupting volcano.


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