The Warm Springs and Mission faults are not on the State Geologist Alquist Priolo maps, so what is the information here?
A. The subject of the Mission Peak Landslide study is primarily a landslide hazard, not earthquake hazards. The 1998 Mission Peak Landslide Study identified the Mission fault and the Warm Springs fault as geologic features within the study area. The State Geologist has not placed these faults on the Alquist Priolo map because there is no physical evidence to show fault surface rupture hazard. This does not mean there are not shaking hazards. The State Map is intended to show surface fault rupture per the Alquist Priolo Act (Ref: http://www.consrv.ca.gov/cgs/rghm/ap/index.htm). It will be updated with the new State Seismic Hazard Maps, which CDMG advises will show these fault traces. Note the new 1997 UBC (Uniform Building Code) fault maps used for structural design show the Mission fault as the Hayward South fault, a Class A fault, (http://gmw.consrv.ca.gov/shmp/) as a step-over feature between the Calaveras fault and the Hayward fault. The Mission and Warm Springs fault traces show se
