FIGURE 7.6.-Displacement rates across the San Francisco Bay region. A, Relative right-lateral displacement rates determined from repeated geodetic surveys made during 1971-87. Error ellipses show 95-percent-confidence limits for each determination (Prescott and others, 1987). B, Relative station velocities parallel to approximate trend of the San Andreas fault (N. 33° W.) plotted against distance perpendicular to this trend for north bay. 1-a bars are indicated. Perpendicular velocity component is negligible and omitted here. C, Same as figure 7.6B for central and south bay.