Further earthquake- Japan...

Earthquake off coast of Miyagi Prefecture. Tsunami warning; 50 cm+ height in concurrence with high tide possible.

DEVELOPING 6:41 PM Eastern

UPDATE: TEPCO and Tohoku Electric Power Company are now both reporting no anomalies at any nuclear power plants as a result of the quake.

6:49 PM Eastern: TEPCO reports a quake of about 4 was felt at Fukushima Daiichi nuclear generating station. No damage has occurred as a result of this quake; the site has already received a quick inspection.

9:49 PM Eastern: All clear issued a long while ago -- no effects have been noted at Fukushima Daiichi. A very shallow and small tsunami did come ashore but it was little more impressive than a slightly fast high tide.