Those aftershocks are all 3.0 and higher too! Here in Hemet and not feeling the aftershocks. There was a 4.5 at 9:59pm.
http://earthquake.usgs.gov/earthquakes/recenteqscanv/Quakes/quakes_big.html
Just looking at the pattern now, the sequence after the 4.5 is looking more normal. It was a little odd after the 5.7, probably hadn’t finished adjusting quite yet.