Improvements in SCEC Community Fault Model for Version 4.0 Craig Nicholson, Andreas Plesch, John Shaw, Egill Hauksson and Peter Shearer MSI UCSB Marine Science Institute, UC Santa Barbara; Earth & Planetary Sciences, Harvard; Seismological Laboratory, Caltech; Scripps Institute of Oceanography, UC San Diego

New SCEC CFM Hierarchical ID Naming & Numbering Scheme

Oblique 3D view looking down-dip of Banning fault showing multiple paths for SAF rupture through San Gorgonio Pass

New SCEC CFM Fault Areas/Major Boundaries

Southern Frontal & Channel Islands fault systems. These include the generally E-W- striking reverse, oblique-reverse and strike-slip faults that bound the northern LA basin, southern Santa Monica Mts and Northern Channel Islands, and would include onshore faults (e.g., Raymond, Hollywood, Santa Monica, & Malibu Coast faults), and faults that extend offshore across the Northern Channel Islands (e.g., Anacapa-Dume, Santa Cruz Island, Santa Rosa Island, Channel Islands thrust, etc). Qfault shapefile names: Santa Rosa Island fault: 92 Santa Cruz Island fault: 93 Malibu Coast fault zone: 99 Anacapa-Dume fault: 100 Santa Monica fault (offshore): 101 Santa Monica fault: 101 Hollywood fault: 102 Raymond fault: 103 CFM 4.0 names: Fault Zone/SystemAbbrevFault SectionAbbrevFault NameAbbrev Southern Frontal fault system SFFS01 Los Angeles basinLAB01 Raymond faultRYMF Southern Frontal fault system SFFS01 Los Angeles basinLAB02 Hollywood faultHWDF Southern Frontal fault system SFFS02 Santa Monica MtsSMMT01 Santa Monica faultSMCF Southern Frontal fault system SFFS02 Santa Monica MtsSMMT02 Malibu Coast faultMBCF Channel Islands fault system CIFS01 AnacapaMULT03 Anacapa-Dume faultANDF Channel Islands fault system CIFS04 Santa Cruz IslandSCIS01 Santa Cruz Island faultSCIF Channel Islands fault system CIFS05 Santa Rosa IslandSRIS01 Santa Rosa Island faultSCIF Channel Islands fault system CIFS00 Anacapa -Santa Cruz IsMULT02 Channel Islands thrustCIT RF HF SMF

Mecca Hills-Hidden Springs fault system. Qfault shapefile names: Berdoo Canyon fault zone:297 Indio Hills fault zone:297 unnamed faults east of San Andreas fault:297 Hidden Springs fault:313 Powerline fault:314 Salton Creek fault:315 Mecca Hills fault zone (Eagle Canyon fault):316 Mecca Hills fault zone (Mecca Hills fault):316 Mecca Hills fault zone (NW Painted Canyon fault):316 Mecca Hills fault zone (Painted Canyon fault):316 Mecca Hills fault zone (Platform fault):316 CFM 4.0 names: 03Mecca Hills-Hidden Springs fault system MHHS01Little San Bernardino Mtns LSBM01Indio Hills faultINHF 03Mecca Hills-Hidden Springs fault system MHHS01Little San Bernardino Mtns LSBM02Berdoo Canyon faultBRCF 03Mecca Hills-Hidden Springs fault system MHHS02Mecca HillsMCHS01Painted Canyon faultPTCF 03Mecca Hills-Hidden Springs fault system MHHS02Mecca HillsMCHS02Mecca Hills faultMCHF 03Mecca Hills-Hidden Springs fault system MHHS03Salton SeaSLTS01Hidden Springs faultHDSF 03Mecca Hills-Hidden Springs fault system MHHS03Salton SeaSLTS02Powerline faultPWRF

Map view of new CFM v.4 faults along San Andreas fault system through San Gorgonio Pass

Oblique 3D view looking down-dip of the Palm Springs fault showing additional subparallel en echelon faults through San Gorgonio Pass PSF

New CFM v.4 fault representations registered to Qfault surface traces compared with CFM v.3 models registered to Jennings (1992) surface fault traces.

Mission Ridge & North Channel fault systems. Qfault shapefile names: Mission Ridge fault system, Arroyo Parida section:88c Mission Ridge fault system, Arroyo Parida section (Arroyo Parida fault): 88c Mission Ridge fault system, Arroyo Parida section (Fernalo Point fault): 88c Mission Ridge fault system, Mission Ridge section (Mission Ridge fault): 88b Mission Ridge fault system, More Ranch section (Campus fault):88a Mission Ridge fault system, More Ranch section (More Ranch fault):88a Mission Ridge fault system, Santa Ana section (Santa Ana fault):88d Mesa-Rincon Creek fault zone:264 Mesa-Rincon Creek fault zone (Carpinteria fault):264 Mesa-Rincon Creek fault zone (Mesa fault):264 Mesa-Rincon Creek fault zone (Mesa-Rincon Creek fault): 264 Mesa-Rincon Creek fault zone (Rincon Creek fault):264 Pitas Point fault:180 Pitas Point-North Channel structure (blind thrust): 180 Red Mountain fault zone (Red Mountain fault): 90 Red Mountain fault zone (Red Mountain fault, middle strand):90 Red Mountain fault zone (Red Mountain fault, north branch):90 Red Mountain fault zone (Red Mountain fault, north strand):90 Red Mountain fault zone (Red Mountain fault, south branch):90 Red Mountain fault zone (Red Mountain fault, south strand):90