A small geodetic network spanning the San Andreas fault was measured 7, 77, 157, and 200 days following the October 17, 1989 Loma Prieta M7.1 earthquake. This network is located at the northwestern end of the rupture plane defined by the locations of numerous aftershocks. In the initial 70-day interval, the measured line-length changes revealed that 5.4¿0.4 mm of right-lateral slip occurred within the network. However, during the later 4 mont interval only a marginally significant rate, 3.2¿1.4 mm/yr, of right-lateral slip could be detected. Thus, it appears that the measured slip is a typical response of the fault following a major shock in that the rate of slip decreases rapidly with time. However, the magnitude of the post-seismic slip is less than 0.5% of the inferred co-seismic slip at depth. ¿ American Geophysical Union 1990