Seafloor unexpectedly active, but scientists see no connection to ice loss
New evidence deep beneath the Arctic ice suggests that a series of underwater volcanoes have erupted in violent explosions in the past decade.
Hidden 2.5 miles (4 kilometers) beneath the Arctic surface, the volcanoes can range up to more than a mile (2 kilometers) in diameter and a few hundred yards (meters) tall. They formed along the Gakkel Ridge, a lengthy crack in the ocean crust where two rocky plates are spreading apart, pulling new melted rock to the surface.
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