FMC Land Use and Planning

Table III-1

Faults in the Project Vicinity, Their Maximum Credible Earthquake Magnitude, Fault Activity Classification, and Distance from Project Area

Fault

Activity³

Distance (miles)

MCE¹

Shaking Intensity ²

Hayward (southern segment)	Holocene (Active) (1836, 1868)	6	7.5	VIII
San Andreas	Holocene (Active)	12	8.3	VII
Calaveras (southern segment)	Holocene (Active)	9	7.3	VII
San Gregorio	Holocene (Active)	25	7.7	VI
San Jose	Quaternary (Potentially Active)	5	NA	NA
Silver Creek	Quaternary (Potentially Active)	3	NA	NA

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N/A = Accurate Estimates Not Available

MCE is the Maximum Credible Earthquake, Richter Magnitude, an estimate of the largest earthquake that is judged by geologic studies to be capable of occurring on a fault or segment of a fault.
The Modified Mercalli Scale is one of several scales used to qualitatively rate earthquake effects on people, objects, structures and the ground surface. The modified Mercalli Scale has been the accepted standard in North America since 1931.
Age is the period of recorded or most recent geologic evidence of earthquake displacement on a fault.

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Source: PG&E, March 9, 1998