Hi Petra. How true. What gets me is that seismologist know about some of the faults, yet seismologists did little about them until the Coalinga quake had shown that they were dangerous. The search is now gathering speed. In mid-February 1994 geologists funded by the US Geological Survey (USGS) and working for William Lettis & Associates, a geological consulting firm in Oakland, reported the possible existence of a band of blind thrust faults extending beneath about 150 square kilometres of the Santa Clara Valley in northern California, which includes Silicon Valley and the city of San Jose. The geologists' analysis was based on a variety of clues, such as evidence of geological features being displaced in local creeks and aerial photographs that show lines of vegetation which may have been nurtured by water seeping from a fault. So far this is the only data I have been able to find concerning these kind of faults in this area. We have a thrust fault here in San Benito County, but its listed as inactive. Where have we heard that before?

If the Coalinga quake didn't tell them anything I'm sure the Northridge quake did. Take Care...Don in creepy town