I can guarantee…USBS doesn't report all quakes.
And downgrades a lot.
I'm only stating facts. They do it. I live in a prone area and about 10% of what happens here gets reported. Take that with a grain of salt as you dun know me from Adam.
Haven't looked into this one though. Generally make my quake rounds a few hours from now plus Saturday….many reporting agencies either jack off at work or don't report in therefore horrible track record of reporting from them on weekends. :)