The acceleration values contoured are the randomhorizontal component. For design purposes, thereference site condition for the map is to be taken asNEHRP site class B. A line shown as a fault location is the projection tothe earths surface of the edge of the fault rupturearea located closest to the earths surface. The faultlocation is shown as solid and/or dashed. The fault isshown solid when deterministic values control overprobabilistic values and dashed when probabilisticvalues control over deterministic values. The numberon the fault is the deterministic median spectralresponse acceleration times 1.5. The values on thefault portion shown solid may be used for interpolationpurposes. When the fault is shown dashed it is forthe purpose of information only and should not beused for interpolation. Selected contours near faults have been deleted forclarity. In these instances, interpolation may be doneusing fault values and the nearest adjacent contour. Regional maps should be used when additional detailis required.

Frankel, A., Mueller, C., Barnhard, T., Perkins, D., Leyendecker, E.V., Dickman, N., Hanson, S., and Hopper, M., 1996, National SeismicHazard Maps: Documentation June 1996: U.S. Geological Survey OpenFile Report 96532, 110 p.Frankel, A., Mueller, C., Barnhard, T., Perkins, D., Leyendecker, E.V., Dickman, N., Hanson, S., and Hopper, M., 1997, Seismic Hazard Maps for the Conterminus United States, Map F Horizontal Spectral Response Acceleration for 0.2 Second Period with 2% Probability of Exceedance in 50 Years: U.S. Geological Survey OpenFile Report 97131F, scale 1:7,000,000.Petersen, M., Bryant, W., Cramer, C., Cao, T., Reichle, M., Frankel, A., Lienkaemper, J., McCrory, P., and Schwartz, D., 1996, Probabilistic Seismic Hazard Assessment for the State of California: California Division of Mines and Geology OpenFile Report 9608, 66 p., and U.S. Geological Survey OpenFile Report 96706, 66 p.

Note: contours are irregularly spaced

Areas with a constant spectralresponse acceleration of 150% g

Point value of spectral responseacceleration expressed as a percentof gravity

Contours of spectral responseacceleration expressed as a percentof gravity. Hachures point indirection of decreasing values.

Locations of faults (see DISCUSSION).The number on the fault is themedian spectral response accelerationtimes 1.5, expressed as a percent ofgravity.

International boundary

State boundary

County boundaryIndex of detailed regional maps at larger scales

Scale 1:5,000,000