Hi Canie. What is interesting is the quake history in the area before the 1857 Fort Tejon quake. What were seeing in the area now isn’t the same, but the similarities are there.

Just about everything I have read about the 1857 quake says we are overdue. However something that is based on a very short history isn’t really very good. Tens of thousands of years might be a little better, but we don’t have the technology to accomplish that. The series of quakes including the 1857 could have been a short cycle and the next quake may not be for another thousands years.

1906 quakes according to trenching on the San Andreas Fault in the Bay Area shows 10 such quakes have occurred in the last 3000 years. However there is a period where two quakes are separated by a little more then 100 years. The 1857 quake and the ones that occurred before it that are being used in the study may have been an unusual short cycle. I wonder if coring such as what Chris is doing could be done along a fault? You could go back further in time, but would it yield the same information as trenching does, but over a much longer time span. Take Care…Don in creepy town