Hi Don,

Indeed your graphic above is correct, but out of date... ;) There were two swarms in San Ramon very recently. There was an additional swarm a few months after the Nov 2002 swarm, which occured in Feb 2003. it was further south southwest and different orientation than the previous Nov swarm.
In fact I believe there was conjecture that the February swarm might have been the Calavaras, due to the orientation, depth and close proximity to the known fault line.

I've felt the 1990, 2002, 2003, and now 2004 swarms. Not sure where this is all going, but makes for some sleepless nights listening to the house popping.
With the 4.2 that occured in February, my 3 year old was in bed, and after checking on him, he said "Daddy what was that?" I said "earthquake". he said "daddy, don't let it come again"
Out of the mouths of babes....
cheers,
-david

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