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Vesuvius is watched constantly and monitored for activity. It could erupt at any time and over a million people live below it. Etna is also watched, several in Mexico and Phillipines, Mt. St. Helen's in WA is active off and on. Mt. Shasta in CA as been dormant since 1924, but it is watched. Not to mention the giant caldera of Yellowstone. All are watched and could erupt.

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14y ago

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