With a population of ~1.3 million, the City of San Diego is the third largest city in California and it is traversed by the Holocene‐active Rose Canyon Fault Zone (RCFZ). The RCFZ is a strike‐slip fault with a slip rate of 1‐2 mm/yr and the potential to produce a M6.9 earthquake. This project focuses on the strands of the RCFZ that traverse from Old Town through the downtown San Diego area. The seismic hazard of the RCFZ has a direct impact on development in and around the city via the Alquist‐Priolo Earthquake Fault Zoning Act, which regulates locations of structures for human occupancy based on seismic assessments. To study the fault zone, geotechnical reports were gathered and examined. Projects were first identified, then reports were reviewed for usefulness. The next phase georeferenced data into an ESRI ArcMap project, which allows users to query data. Finally, the data were interpreted from a geologic perspective to give an understanding of the deformation and stratigraphy in the area. This work did not yield direct evidence of the fault through Little Italy nor through the Old Town area of San Diego. Nevertheless, the results did show that the stratigraphy could be correlated within short distances in the study area, which may yield evidence of faulting with future work.
