Just saw this....from the blasting? 2.2M near the DAM
A micro quarry occurred at 11:43:17 AM (PDT) on Thursday, May 4, 2017.
The magnitude 2.2 event (a probable quarry explosion) occurred 10 km (6 miles) N of Oroville, CA.
The hypocentral depth is -0.37 km (-0.2 miles).
post 3567
looks like there is a quarry in that area with small microquakes in the past....disregard