After a new 7.4 strong earthquake at sea near Japan, there’s a tsunami alert out with a possible 2 metre wave already formed.
Workers trying to bring the stricken nuclear power plant at Fukushima under control have already been evacuated.
Tsunami warnings and advice have been issued for a stretch of more than 482km of the northeastern coast from Aomori prefecture in the north to Ibaraki prefecture in central Japan, just north of Tokyo.
Hundreds of aftershocks have shaken the northeast region devastated by the March 11 earthquake, but few have been stronger than 7.0 on the logarithmic richter scale.

Andy Roberts is a writer who initiated DARnet. Contact me on aroberts@gmail.com or @aroberts on twitter