The most active volcano in the Pacific Northwest is the Axial Seamount. It’s located 300 miles west of Astoria, Oregon, and a mile under the ocean. It’s erupted three times in the past 25 years.

Known as Axial Seamount, it’s the most active volcano in the Pacific Northwest — though one most people haven’t heard of because it lies about 300 miles offshore and just under a mile ...

A volcano in the Pacific Northwest is showing signs of activity with an eruption imminent. The Axial Seamount is a mile-wide underwater volcano that sits 300 miles off the coast of Oregon and more ...