A tsunami warning has been issued for coastal regions of Japan following a magnitude 6.7 earthquake that struck the north of the country at 6.56 a.m local time.
According to the Japan Meteorological Agency, the quake struck just off the coast of Iwate Prefecture, 85 miles southeast of Hachinohe. There have been no immediate reports of casualties or damage.
Aftershocks, some quite powerful, have been a regular feature in Japan since the March 11 quake, and as was demonstrated in Christchurch recently, it's essential that officials and the public remain on guard for months after the original earthquake hits.
We'll keep you posted if there's any major news.