Hello Petra, I've been once to Parkfield ona field trip, a long time ago...or maybe I just stopped by with my family. Bailey (I think) led a UCSB field trip to Mammoth in 1988...sitting on top if a viewpoint looking over road where quakes showed dike injection almost got to the surface...I think in 1980...at that time, USGS really thought it was going to blow....don't know if it is true, but I recall/heard that they moved their local office from Bishop to Nevada....I don't get in the field much (OK, hardly at all) the last few years. I may get in the field more in Turkey than here in the next couple of years. Chris