Thanks for putting this together! Very interesting!

Yes indeed this proves my theory that something is up in that areas (vs. if the catalog returned magnitude 4s every 5-10 years going through the 90s, 80s, 70s, etc)...

The 5.4 Chino Hills quake always struck me as suspicious. I've always thought if we got 5 years without anymore activity in that area then it would be a fluke, but we are about exactly 4 years and now this. All of the LA area has seen an increase in 3s and 4s last 3 months.