Aftershocks diminishing?

The Japanese megaquake seems to be simmering down, to my untrained eye. There has only been one Mag. 5 aftershock per day off the coast of Honshu for the last few days. A week or so ago, that number ranged from about 4 to about 9 a day, with some quakes at Mag. 6 or a bit higher.

USGS M 5+ Earthquakes