Fukushima workers ordered to leave 07 Apr 2011 Following a new 7.4 magnitude earthquake that hit Japan's northeastern coasts, workers at the crisis-hit Fukushima nuclear plant have been evacuated. The strong earthquake on Thursday hit 25 miles (40 kilometers) under the water and off the coast of Miyagi prefecture which has already been ravaged by a destructive quake and tsunami on March 11. The Japan meteorological agency issued a tsunami warning for a wave of up to 6 feet (two meters) for the country's northern coastal area.