The circle of seismic activity in the Pacific Ocean, known as the "ring of fire," stretches from Australia to Russia around to Alaska and America's West Coast and down to Chile in South America. It's an area responsible for 90 percent of the world's earthquakes and 75 percent of its volcanoes. So which of the more than 26 nations in the ring has nuclear power? Only three: Japan, of course (more than 50 plants); the United States (eight reactors at four plants); and Mexico (two reactors at one plant). Here's a look at the five non-Japanese plants in the world's most active earthquake zone:
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