Magnitude 7.4

We have just had another aftershock which felt quite big in Tokyo.  It came about 15 seconds after the earthquake warning on our mobile phones. At magnitude 7.4 (initially it was listed as 7.1) and 6+ on the Japanese scale - it felt big enough to be an earthquake in its own right.  There are tsunami warnings & cautions.
Earthquake Information (Information on seismic intensity at each site)


Issued at 23:37 JST 07 Apr 2011  Occurred at (JST) 23:32 07 Apr 2011
Latitude 38.2N (degree) Longitude  142.0E  Depth 40 km Magnitude 7.4  Region Name Miyagi-ken Oki

http://www.jma.go.jp/en/quake/20110407233639391-072332.html