Ramba uchinyora ndima iyi - Chimwe chinhu chinoita kuti Simi Valley ive pedyo neSimi Hills ndechokuti iri munharaunda ine ngozi zvikuru yemoto unoparadza makomo okuSouthern California makore mashoma oga oga. Simi Valley inewo ngozi yokudengenyeka kwepasi. Mupata wacho wakapoteredzwa nemapako; ari pedyo zvikuru ari Santa Rosa Fault kuchamhembe kwakadziva kumadokero, Northridge Hills Fault kuchamhembe kwakadziva kumabvazuva, uye Chatsworth Fault kumaodzanyemba. Muna 1994, zvikamu zveSimi Valley zvakakanganiswa zvikuru nokudengenyeka kweNorthridge
. Ona Tsaona Yenyukireya paSSFL nokuda kwemashoko pamusoro penjodzi nenjodzi yakabatana (s) kuvagari.