Die USGS hat es auf 6.6 runtergestuft...
http://earthquake.usgs.gov/earthquakes/ ... es_all.php
MAP 6.6 2011/04/11 08:16:13 37.007 140.477 10.0 EASTERN HONSHU, JAPAN
Magnitude 6.6
Date-Time
Monday, April 11, 2011 at 08:16:13 UTC
Monday, April 11, 2011 at 05:16:13 PM at epicenter
Time of Earthquake in other Time Zones
Location 37.007°N, 140.477°E
Depth 10 km (6.2 miles)
Region EASTERN HONSHU, JAPAN
Distances 36 km (22 miles) W of Iwaki, Honshu, Japan
44 km (27 miles) SSE of Koriyama, Honshu, Japan
71 km (44 miles) N of Mito, Honshu, Japan
161 km (100 miles) NNE of TOKYO, Japan
Location Uncertainty horizontal +/- 12 km (7.5 miles); depth +/- 3.6 km (2.2 miles)
Parameters NST=581, Nph=584, Dmin=209.3 km, Rmss=0.69 sec, Gp= 18°,
M-type=regional moment magnitude (Mw), Version=C
Source
USGS NEIC (WDCS-D)
Event ID usc0002n9v