An underwater volcano off the coast of Oregon is gearing up for an eruption, according to volcanologists who are monitoring for activity. The Axial Seamount — an underwater volcano located about 300 miles off the coast of Oregon and 4,900 feet below the surface — has been displaying behavior that indicates an eruption is imminent, researchers at Oregon State University say. Seismic activity near the volcano is ramping up as well. In June, more than 2,000 earthquakes were recorded in a single day