The Pacific Ring of Fire, also known as the circum-Pacific seismic belt, is a 40,000 km (24,854 mile) horseshoe shaped zone of frequent seismic and volcanic activity. Ninety percent of the world’s earthquakes occur in the Ring of Fire, which encircles the basin of the Pacific Ocean. The Ring of Fire is a direct consequence of plate tectonics and the movement and collisions of crustal plates. What causes the high levels of volcanism in British Columbia and the Yukon Territory? Discuss