One of my best friends in the states plotted this data. It's good news.
Feel free to share/comment.
An analysis of the last week’s worth of data from the Japanese earthquakes with magnitude greater than 5, as published by the USGS:
The aftershocks are, on average, getting weaker:
They are also getting less frequent (currently down to about 3/day from about 1/hour right after the big one):
The epicenters are staying close to the big one (no trend towards Tokyo or anything):
The epicenters are pretty much staying at the same depth (no trend up):
So the aftershocks are not moving towards Tokyo, not rising, and not sustaining their intensity or frequency. I think, based on this data, that at least we can rule out Godzilla rising from the laundry list of crap Japan will have to deal with in the aftermath.