The Ring of Fire (Pacific Ring of Fire) is an area of Pacific Plate subduction, rimming (of course) the Pacific Ocean. The plate subduction creates a line of volcanism geographically around its perimeter that appears to form a circle or ring.
The Ring of Fire is the subducting plate boundary of the shrinking Pacific Ocean. The subducting oceanic crust is being drawn under less dense oceanic and continental crust and is melting into the upper mantle which can lead to volcanism and earthquakes.
A geologist studies natural hazards such as volcanoes and earthquakes.
Extinct
dormant volcanoes
Where two tectonic plates slide past each other A+
an opening in the earths crust