Hi Petra. The Hamilton restoration site is located on San Pablo Bay intertidal deposits and as such must meet the guidelines of the Alquist-Priolo Special Studies Zone.
The restoration site is located 13 miles northeast of the San Andreas fault, 7 miles northwest of the Hayward fault, and 8 miles southwest of the Rodgers Creek fault. Two potentially active faults are also located in proximity to the site. The Burdell Mountain fault is located 1.5 miles north of the site and Tolay fault lies 6.5 miles from the site.
A possible trace of the Burdell Mountain fault is mapped as extending toward and terminating about 4,000 feet north and west of the site (Rice 1974). There are various estimates of the date of the last displacement on the Burdell Mountain fault. It is generally thought to have been active in Quaternary time (the last 2.5 million years), and there is some evidence suggesting that it may have been active in Holocene time (the last 11,000 years). However, the fault is not designated as an "active" fault by the State and is not included within an Alquist-Priolo Special Studies Zone. The full trace of the Tolay fault is not know either and also considered to be inactive by the State. However the epicenter map shows some small quakes (1.0 to 1.9) (2.0-2.9) to have centered within 2Km of the Tolay fault. Date not known and was recorded on the University of California, Berkeley seismograph. The data used by UCB was taken from 1910 to 1971. Most of the quakes were at the southern tip of the Tolay fault, but this is also very close to the Rodgers Creek fault. The one at the northern end of the Tolay fault is the one that is less then 2K. It is some distance from the Rodgers Creek fault. Take Care...Don in creepy town.