This is not normal for such a small quake. A 5.6 usually does not have anywhere near this many after shocks. Really, this quake was just a baby compared to Northridge. I do remember all those aftershocks then. I am beginning to think something bigger might be coming. It did take 4 days for the largest after shock to occur after the 1968 Borrego Mountain quake. That quake was a 6.5, and was much strong than this Anza quake.

glen