( CNN ) -- A 6.2-magnitude earthquake struck off Japan 's eastern coast early Tuesday , the U.S. Geological Survey reported . With a depth of 9 kilometers ( 5.6 miles ) , the tremor was about 96 kilometers ( almost 60 miles ) east-northeast of Miyako and 550 kilometers ( 342 miles ) north-northeast of Tokyo , according to the U.S. agency . The quake occurred just over a year and a half since a 9.0-magnitude earthquake triggered a huge tsunami off Japan , resulting in thousands of deaths and the world 's worst nuclear crisis in a quarter century . The Japan Meteorological Agency , however , did not issue any tsunami warnings or advisories immediately after the Tuesday morning quake , according to its website . No such warnings were issued by the Pacific Tsunami Warning Center either . A little more than 30 minutes after this first earthquake , another significant , if slightly weaker one , hit the same general area . 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 . Tuesday 's second quake was much deeper than the first , rooted about 38 kilometers ( 23.6 miles ) below sea level .
NEW : A first , slightly smaller quake hits about 30 minutes later in the same area . The second , stronger 9-kilometer deep earthquake did not set off tsunami warnings . It was centered about 550 kilometers ( about 550 kilometers ) north-northeast of Japan . A stronger a quarter century quake triggered a tsunami that led to thousands of deaths .