Improvements in SCEC Community Fault Model for Version 4.0

Craig Nicholson, Andreas Plesch, John Shaw, Craig Nicholson, Andreas Plesch, John Shaw, Egill Hauksson and Peter ShearerEgill Hauksson and Peter Shearer

MSIUCSB

Marine Science Institute, UC Santa Barbara; Marine Science Institute, UC Santa Barbara; Earth & Planetary Sciences, Harvard; Earth & Planetary Sciences, Harvard;

Seismological Laboratory, Caltech;Seismological Laboratory, Caltech;

Scripps Institute of Oceanography, UC San DiegoScripps 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: 92Santa Cruz Island fault: 93Malibu Coast fault zone: 99Anacapa-Dume fault: 100Santa Monica fault (offshore): 101Santa Monica fault: 101Hollywood fault: 102Raymond fault: 103

CFM 4.0 names:

Fault Zone/System Abbrev Fault Section Abbrev Fault NameAbbrev

Southern Frontal fault system SFFS 01 Los Angeles basin LAB 01 Raymond faultRYMF

Southern Frontal fault system SFFS 01 Los Angeles basin LAB 02 Hollywood faultHWDF

Southern Frontal fault system SFFS 02 Santa Monica Mts SMMT 01 Santa Monica faultSMCF

Southern Frontal fault system SFFS 02 Santa Monica Mts SMMT 02 Malibu Coast faultMBCF

Channel Islands fault system CIFS 01 Anacapa MULT 03 Anacapa-Dume fault ANDFChannel Islands fault system CIFS 04 Santa Cruz Island SCIS 01 Santa Cruz Island fault SCIFChannel Islands fault system CIFS 05 Santa Rosa Island SRIS 01 Santa Rosa Island fault SCIFChannel Islands fault system CIFS 00 Anacapa -Santa Cruz Is MULT 02 Channel Islands thrust CIT

RFHF

SMF

Mecca Hills-Hidden Springs fault system. Qfault shapefile names:Berdoo Canyon fault zone:297Indio Hills fault zone:297unnamed faults east of San Andreas fault:297Hidden Springs fault:313Powerline fault:314Salton Creek fault:315Mecca Hills fault zone (Eagle Canyon fault):316Mecca Hills fault zone (Mecca Hills fault):316Mecca Hills fault zone (NW Painted Canyon fault):316Mecca Hills fault zone (Painted Canyon fault):316Mecca Hills fault zone (Platform fault):316

CFM 4.0 names:0303 Mecca Hills-Hidden

Springs fault systemMHHS 01 Little San

Bernardino MtnsLSBM 01 Indio Hills fault INHF

03 Mecca Hills-Hidden Springs fault system

MHHS 01 Little San Bernardino Mtns

LSBM 02 Berdoo Canyon fault BRCF

03 Mecca Hills-Hidden Springs fault system

MHHS 02 Mecca Hills MCHS 01 Painted Canyon fault PTCF

03 Mecca Hills-Hidden Springs fault system

MHHS 02 Mecca Hills MCHS 02 Mecca Hills fault MCHF

03 Mecca Hills-Hidden Springs fault system

MHHS 03 Salton Sea SLTS 01 Hidden Springs fault HDSF

03 Mecca Hills-Hidden Springs fault system

MHHS 03 Salton Sea SLTS 02 Powerline fault PWRF

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: 88cMission Ridge fault system, Arroyo Parida section (Arroyo Parida fault): 88cMission Ridge fault system, Arroyo Parida section (Fernalo Point fault): 88cMission Ridge fault system, Mission Ridge section (Mission Ridge fault): 88bMission Ridge fault system, More Ranch section (Campus fault): 88aMission Ridge fault system, More Ranch section (More Ranch fault): 88aMission Ridge fault system, Santa Ana section (Santa Ana fault): 88dMesa-Rincon Creek fault zone: 264Mesa-Rincon Creek fault zone (Carpinteria fault): 264Mesa-Rincon Creek fault zone (Carpinteria fault): 264Mesa-Rincon Creek fault zone (Mesa fault): 264Mesa-Rincon Creek fault zone (Mesa-Rincon Creek fault): 264Mesa-Rincon Creek fault zone (Rincon Creek fault): 264Pitas Point fault: 180Pitas Point-North Channel structure (blind thrust): 180Red Mountain fault zone (Red Mountain fault): 90Red Mountain fault zone (Red Mountain fault, middle strand): 90Red Mountain fault zone (Red Mountain fault, north branch): 90Red Mountain fault zone (Red Mountain fault, north strand): 90Red Mountain fault zone (Red Mountain fault, south branch): 90Red Mountain fault zone (Red Mountain fault, south strand): 90