Records from a seismic network deployed as part of an active tomography experiment at 9¿30'N on the East Pacific Rise (EPR) provide an opportunity to characterize local microearthquake activity over an 8-day period. With the exception of the region around the 9¿03' overlapping spreading center (OSC), no events were located on the rise axis. One microearthquake, located from P and S-wave arrival times, lies adjacent to the network, 18 km to the west of the rise axis. Five more events, located from P-wave and T-phase data, are to the south of the network. Three cluster around the western arm of the 9¿03' OSC, while two are located 25--30 km to the east of the OSC. The seismic moments of the microearthquakes range from 5¿1019 to 4¿1020 dyn cm, several orders of magnitude larger than those reported in other studies of shallow events along the axis of the EPR. These results suggest that overlapping spreading centers may be the loci of substantial microearthquake activity and that at this location the normal faults that form on the young flanks of the EPR are active off-axis to distances of at least 20 km. ¿ American Geophysical Union 1992