Another Earthquake Hits Japan

File Photo from last month's magnnitude 8.9 earthquake in Japan. (AP Photo/Nexco East Japan via Kyodo News)

Another earthquake has hit Japan, this one measuring 7.4 in magntude on the Richter scale. Japanese authorities have issued a tsunami warning for the country's northeast coast, which is still digging out from the rubble of last month's wreckage. The epicenter of the quake is 73 miles from the beleaguered Fukushima Dai-ichi nuclear power plant where workers have struggled to cap reactor leaks and restore power to the plant to cool reactor fuel rods.