The earthquake, which caused substantial shaking in Ibaragi and Chiba prefectures east of Tokyo, followed just a few hours after a magnitude 6.8 quake jolted northern Japan.
A tsunami warning was issu
ed but later lifted after the northern Japan earthquake.
Just over one year ago, the northeast coast was struck by a magnitude 9 earthquake, Japan's strongest on record, and a massive tsunami, triggering the world's worst nuclear crisis in 25 years.
Magnitude 6.1 quake jolts eastern Japan, no tsunami warning - Yahoo! News Canada (external - login to view)