Nyorai kupfuurira kweiyi ndima - Nemhaka yenhau yayo yokubereka kudengenyeka kukuru (1857, 1906
) chinonyanya kukosheswa pakuongorora njodzi dzinokonzerwa nokudengenyeka kwenyika muCalifornia kwave kuri zvikanganiso zveSan Andreas System. Zvisinei, gadziriro yezvikanganiso, kusanganisira Sierra Madre<unk>Cucamonga Fault System iyo inomhanya pamuganhu weSan Gabriel neSan Fernando Valleys, yakakonzerawo nhevedzano yezviitiko zvine mwero kusvika kune zvakakura muGreater Los Angeles Area. Chikamu chokumadokero zvikurusa cheiyi gadziriro yokuvhiringidzika chakaputsika muna 1971 uye chakazivikanwa kuva chimwe chezvinhu zvitanhatu zvikuru zvinovhiringidza gadziriro yokuvhiringidzika izvo zvinomutsa tyisidziro kunharaunda ine vanhu vakawanda.