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Mount St. Helens emits heavy plume of smoke and ash

A heavy plume of smoke and ash is released from Mount St. Helens

A heavy plume of smoke and ash is released from Mount St. Helens in the state of Washington. The once-quiet land volcano has erupted many times since its initial outburst on July 22, 1980, giving scientists a solid chance to study natural phenomena.

Credit: Norman G. Banks, United States Geological Survey

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