I don't think an uptick in CA is unusual considering the 2 large quakes that hit off the coast of Oregon a few days ago. That being said, it's quite a big swarm and it blew up really quickly. there were only 29 quakes when I mentioned it this morning, now there are over 200! Time will tell if this is leading somewhere or not. I recall a somewhat recent swarm at Salton that was big and crazy like this, but died out as quick as it started.

ETA: Here's an article on the last swarm I was thinking of. Looks similar to this one
[link to temblor.net (secure)]