I compared today’s still to be determined quake to last weeks 4.5. Note today’s though not as intense with the initial shock is much deeper with it rolling. This may be caused by it being a bit more shallow but I don’t think so.
Today’s(as posted above)
http://quake.wr.usgs.gov/waveforms/wavesshk/nc71362405.rsec0.html
Last Week’s 4.5
http://quake.wr.usgs.gov/waveforms/wavesshk/nc71359410.rsec0.html
You can compare the stations(most are on both)and see that to which I speak.
At any rate, the signature for it was definitely different that the previous three aftershocks from the main quake there in January.
Interesting stuff!