A strong earthquake struck Friday off the coast of northeastern Japan in the same region that was hit by a massive earthquake and tsunami last year. A city in the region reported that a small tsunami had hit, but there were no reports of injuries or damage.

The Japan Meteorological Agency said the earthquake had a preliminary magnitude of 7.3 and struck in the Pacific Ocean off the coast of Miyagi prefecture at 5:18 p.m. (0318 Eastern). The epicenter was 6.2 miles beneath the seabed.

After the quake, which caused buildings in Tokyo to sway for at least several minutes, authorities issued a warning that a tsunami potentially as high as 2.19 yards could hit. Ishinomaki, a city in Miyagi, reported that a tsunami of 1 yard hit at 6:02 p.m. (0402 Eastern).

The Pacific Tsunami Warning Center said there was no risk of a widespread tsunami, and subsequently dropped all tsunami warnings for the Japanese coast.

Miyagi prefectural police said there were no immediate reports of damage or injuries from the quake or tsunami, although traffic was being stopped in some places to check on roads.

Shortly before the earthquake struck, NHK television broke off regular programming to warn that a strong quake was due to hit. Afterward, the announcer repeatedly urged all near the coast to flee to higher ground.

Adam Ezard, a British expat living in Tokyo, tells CBSNews.com that Japanese media responded much mo.