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Huge undersea volcano off the West Coast may be getting ready to erupt

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The Axial Seamount is a massive undersea volcano that reaches more than 3,600 feet above the seabed, 300 miles offshore.

It last erupted in 2015 but has a history of more than 50 different eruptions over the last 800 years .

Because the top of the volcano is still 4,500 feet below the ocean’s surface, it poses no danger to people.

The mechanics of an Axial eruption are much like those of volcanos in Hawaii and Iceland .