Tokyo: An earthquake with a preliminary magnitude of 4.7 shook buildings in Tokyo on Wednesday, Japan`s Meteorological Agency said, but no tsunami warning was issued and there were no immediate reports of damage.
Earthquakes are common in Japan, one of the world`s most seismically active areas. Japan accounts for about 20 percent of the world`s earthquakes of magnitude 6 or greater.
On March 11, 2011, the northeast coast was struck by a magnitude 9 earthquake, the strongest quake in Japan on record, and a massive tsunami. Those events triggered the world`s worst nuclear crisis since Chernobyl a quarter of a century earlier.