Smack in the middle of lots and lots of people. Prayers to the folks in that area.
Just talked to family in Chino Hills. No big. They rocked and rolled. But it doesn't sound like there was any major property damage. From what I see, they were sitting right on top of it. Now, they are up in the hills a bit and hills don't shake as much as the valleys. But it doesn't sound like this is anything like the Northridge quake or Loma Pietra.