San Andreas Fault kpatara ala ọma jijiji na 1906 na 1989. Obere ala ọma jijiji na-eme mgbe nile. Ihe iyi egwu nke nnukwu ala ọma jijiji na-arụ ọrụ dị ukwuu na mmepe obodo. Obodo wuru usoro mmiri inye aka ma na-emelite koodu ụlọ ya ugboro ugboro, na-achọ nkwalite maka ụlọ ndị okenye na ụkpụrụ injinịa dị elu maka owuwu ọhụrụ. Otú ọ dị, a ka nwere ọtụtụ puku obere ụlọ ndị na-adịgide adịgide na-enwe mmetụta nke ala ọma jijiji. USGS ewepụtala California ala ọma jijiji amụma nke ụdị ala ọma jijiji na-eme na California. San Francisco n'ụsọ oké osimiri etowo karịrị ya eke ókè.
ihe ndị e gwuru n'ọnụ mmiri ahụ nakwa ihe ndị e nwetara site n'igwu olulu nke Yerba Buena