FIGURE 7.7.- Displacement rates in southern California. A, Relative right-lateral displacement rates determined from repeated geodetic-survey measurements during 1973~7. 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. 39° W.) plotted against distance perpendicular to this trend, for stations in northern part of map in figure 7.7A. 1-a error bars are indicated. Perpendicular velocity component is negligible and is not plotted here. C, Same as figure 7.7B for stations largely to north (N) and south (S) of the Salton Sea.