Map showing recently active breaks along the San Jacinto fault zone between the San Bernardino area and Borrego Valley, California

This strip map of the San Jacinto fault zone is one of a set designed to show the lines of inferred most recent movement within the San Andreas fault system. The character and location of these lines are important to scientists and engineers who study faulting and earthquakes and should be helpful to those concerned with land use and development on or near the faults. The mapped lines mark suspected displacements of the ground surface by rupture or creep within the San Jacinto fault zone.