Ku dhammee weedha soo socota: Hal arrin oo ka mid ah meesha uu ku yaalo Simi Valley, oo ku ag taal buuraha Simi Hills, waa in ay ku taal meel khatar badan u leh dabka kaymaha oo ku dhufto buuraha Koonfurta California dhowrkii sanoba mar. Simi Valley sidoo kale waxay halis ugu jirtaa dhulgariir. Dooxada waxaa ku xeeran cilado; kuwa ugu dhow waa Santa Rosa Fault ee Waqooyi-galbeed, Northridge Hills Fault ee Waqooyi-bari, iyo Chatsworth Fault ee Koonfurta. Sanadkii 1994, qaybo ka mid ah Simi Valley ayaa waxyeelo weyn ka soo gaartay
Dhulgariirkii ka dhacay Northridge. Eeg Shilka Nukliyeerka ee SSFL si aad u hesho macluumaad ku saabsan shilka iyo khatarta la xiriirta ee ku wajahan dadka deggan.