NEW : A second , slightly smaller quake hits about 30 minutes later in the same area . The first one was a bit stronger than this one It was centered about 550 kilometers ( 342 miles ) north-northeast of Tokyo . This 5.1-magnitude tremor was about the same distance from Tokyo as the first and about 107 kilometers ( 66 miles ) east of Miyako -- which was among the areas devastated by the March 2011 earthquake and tsunami -- according to the U.S. Geological Survey . A stronger March 2011 quake triggered a tsunami that led to thousands of deaths .
NEW : A second , slightly smaller quake hits about 30 minutes later in the same area . The first one was a bit stronger than this one It was centered about 550 kilometers ( 342 miles ) north-northeast of Tokyo . A stronger March 2011 quake triggered a tsunami that led to thousands of deaths .