Monster Aftershock Could Strike Within Days
http://www.smh.com.au/environment/monster-aftershock-could-strike-within-days-20110313-1bt2p.html
Historically, it would be one point lower, a 7.9.
"The US Geological Survey estimated the quake moved the Japanese coast about 2.4 metres.
''It basically pushed the sea floor up and down on opposite sides of the fault by 10 metres, causing the tsunami,'' Dr McCue said. ''It is a sudden rupture that has occurred, but it has occurred because the two plates are converging at about eight centimetres a year and have been for about 100 years. That eight metres is released suddenly when the plate snaps and breaks and produces the earthquake.''
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