Which ocean is known for the Ring of Fire?

The ocean known for the Ring of Fire is the Pacific Ocean.

The Ring of Fire is a roughly 25,000-mile tectonic belt encircling much of the Pacific basin. It is marked by frequent earthquakes, volcanic eruptions, and deep ocean trenches, including the Peru–Chile Trench, Japan Trench, and Mariana Trench.

This activity is caused mainly by subduction, where one tectonic plate dives beneath another. About 90% of the world's earthquakes occur within the belt, which contains roughly two-thirds of the planet's volcanoes. It is not one continuous geological structure, however: some sections contain different plate boundaries, and some areas are debated.

A common mix-up is Hawaii. Although it is volcanic and lies in the Pacific, its volcanoes are mainly produced by a hotspot rather than subduction, so central Hawaiian volcanoes are not usually considered part of the Ring of Fire.