Reply #90: Actually, unsurprisingly, that's not the case. Over time aftershocks from a major quake

[Garbo 2004]

decrease in both frequency and magnitude. With 9.0 megathrust quakes it takes a very long time for that to happen, in human as opposed to geologic time. And there's still the possibility of at least around a magnitude 8 aftershock, but so far that has yet to happen.

There have been, so far, perhaps only a couple in the 7+ range in the weeks after the initial quake, IIRC. A 6.6 (USGS) on the 11th seems to have had generated its own aftershocks, but again decreasing in magnitude.

See for yourself. It's not like no one keeps records of this stuff.

http://neic.usgs.gov/neis/qed/
http://earthquake.usgs.gov/earthquakes/recenteqsww/Maps/region/Asia_eqs.php