It is, but there's a subduction zone just off their northern coast following the curve of the Lesser Antilles so I could see how someone might mistakenly lump it into the pacific ring. It's not that far away from the northern Andes, in the grand scheme of things.

It's mostly on the Caribbean Sea. Which kinda has its own little ring of fire - https://earthquake.usgs.gov/earthquakes/tectonic/images/cari...