6.2-magnitude earthquake strikes off Japanese coast

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 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, CNN reported.