This swarm is an interesting one...indeed.

The other swarm in state that is a little concerning is the one just east of Fremont on the Calaveras fault. I've never seen this segment so active before. The last month its been popping off dozens of 1s, 2s, a 3 and 4. This is the area of concern with scientists where they have learned this part of the fault interacts with the Hayward Fault which as we all know is now do.