Alva Review-Courier -

ST. GEORGE'S, Grenada (AP) — A Caribbean seismic research center says an underwater volcano just north of Grenada may be about to erupt but does not pose a tsunami threat to the region.

The University of the West Indies Seismic Research Center says the main threat posed by the Kick 'em Jenny submarine volcano is to shipping. All boats are being directed to observe an exclusion zone of 3.1 miles (5 kilometers) around the volcano.

The center raised its alert level Tuesday from yellow to orange amid a "substantial" increase in earthquake activity. It said an eruption may begin with less than 24-h...