1952 Kern County earthquake occurred on July 21 in the southern San Joaquin Valley and measured 7.3 on the moment magnitude scale . The main shock occurred at 4:52 am Pacific Daylight Time ( 11:52 UTC ) , killed 12 people and injured hundreds , and caused an estimated $ 60 million in property damage . A small sector of damage near Bealville corresponded to a maximum Mercalli intensity of XI ( '' Extreme '' ) , though this intensity rating was not representative of the majority of damage . The earthquake occurred on the White Wolf Fault near the community of Wheeler Ridge and was the strongest to occur in California since the 1906 San Francisco earthquake
1906 San Francisco earthquake
1906 San Francisco earthquake
1952 Kern County earthquake