Underwater volcano-like structure is spewing gas off Alaska's coast, US Coast Guard says
Favicon 
www.livescience.com

Underwater volcano-like structure is spewing gas off Alaska's coast, US Coast Guard says

Mapping in the Chukchi and Beaufort seas off Alaska has uncovered a 1,640-foot-tall structure on the seafloor, but scientists say it's too early to determine the nature of the discovery.