CREEP RESPONSE OF THE HAYWARD FAULT TO STRESS CHANGES CAUSED BY THE LOMA-PRIETA EARTHQUAKE

In 1996, an 18-millimeter creep event, the largest ever observed on th e Hayward fault, occurred between surveys 63 days apart. This event ma rked the end of a period of severely reduced creep on the southern par t of the fault that began after the 1989 Loma Prieta, California, eart hquake. The reduction in creep was consistent wi th elastic models for earthquake-induced static stress changes on the Hayward fault. These data suggest that creep observations can indicate regional stress chan ges of about 1 bar or less.