RELATION OF KNOWN FAULTS TO SURFACE RUPTURES, 1971 SAN FERNANDO EARTHQUAKE, SOUTHERN CALIFORNIA
SURFACE RUPTURING DURING THE FEBRUARY 9, 1971, SAN FERNANDO EARTHQUAKE OCCURRED CHIEFLY ALONG KNOWN FAULTS THAN CAN BE INCLUDED IN THE SANTA SUSANA-SIERRA MADRE FAULT ZONE. MOST OF THE SURFACE DISPLACEMENTS WERE ASSOCIATED WITH KNOWN FAULTS THAT ARE SHOWN ONLY ON UNPUBLISHED MAPS. BECAUSE THE METROPOLITAN WATER DISTRICT (MWD) HAS TUNNELS UNDER CONSTRUCTION AND OTHERS PROPOSED IN THIS AREA, MOST OF THE FAULTS WERE STUDIED IN DETAIL TO DETERMINE THEIR RESPECTIVE EFFECTS UPON GROUNDWATER DISTRIBUTION AND TUNNEL CONSTRUCTION. THESE SURFACE BREAKS AND ASSOCIATED FAULTS ARE DESCRIBED. /AUTHOR/