This is just another aftershock, I suppose. Of course, quakes of this magnitude were common in that area even before the big one last month.
Not an aftershock; completely different system of faults and nowhere near the area that slipped in the Sumatran quake.
Considering it occured in an area with a high concentration of Christians the usual sort of moronic gloatfest over the quake as punishment seems even more stupid than usual as well.
Not a particularly big deal or notable as a quake.