Fair enough that you clarify that/correct my comments. Since this is interesting, the following might be worth discussion (correct me again if I am incorrect:
Most of those earthquakes were in 2 locations: geysers and near San Juan Bautista? (esp geysers?)

Question: when you say "during the solar flare", do you mean "during the magnetic storm" (during the time that the Kp was red on the noaa SEC page?)? Or, during the time that X-ray flux was high?

Is it true that during the somewhat later storms April 18 and 19 (continuing today) there has been no increase? And, that if some small amount of strain is released on April 17 at 2 locations, should there not be plenty of strain/stress to release at many other areas of California?

The ongoing magnetic storm (Kp) is pretty significant. Since it sill looks like seismicity is depressed in California (base on your numbers, and SCEC page for today), except in northern California on the 17th, how does one evaluate the likelihood that this lull must eventually go back to normal of higher than normal (if seismicity is oscillating in some way), vs when there is storminess? I guess a big flareup within 3-4 days (or whatever your delay is) would be interesting.
(Wierd coincidence, heard an eartone while writing this email and only hear them about 2 times/month).

These questions are not to give you a hard time-it is to try and understand what is going on-which is needed for this relationship to be more useful.
Chris