A1
San Andreas, 1906 rupture
RL
Slip rate after: Niemi and Hall [1992];  Prentice and others [1991], north of Golden Gate. Average slip in 1906 north of Golden Gate was 5-6 m [Thatcher and others, 1997]  Lower slip, 2-4 m, south of Golden Gate
A2
San Andreas, peninsula-independent
Segment between 1989 rupture and 2-km right step at Golden Gate [Cooper, 1973], where 1906 slip dropped 5-6 m to 2-3 m [Thatcher and others, 1997] Recurrence in text. Rate limits: local [ Hall and others, 1995], regional [Lienkaemper and others, 1991]
A3
San Andreas, Santa Cruz Mts -indep.
Patch size after Lisowski and others [1990], but use 90¡ dip as more characteristic of right-lateral events. Slip rate 17 mm/yr [Lienkaemper and others, 1991] less 3 mm/yr on Sargent fault.  Balances recurrence of great SAF and San Gregorio fault events
A4
San Gregorio
R-RL
Prelim. rates: 3-9 mm/yr, Ao Nuevo [Weber & Nolan, 1995] ; Seal Cove, >5mm/yr (14 ka), <4.5 mm/yr (~85 ka [G. D. Simpson & others, W. R. Lettis & Assocs., 1995, writ. com.]  SE-end, 2-3 km right step. Vertical slip <1 mm/yr [Anderson & Menking, 1994]
A5
San Gregorio, Sur region
Slip rates from San Simeon and Hosgri faults to southeast.  Latest Quaternary geologic rate >1-3 mm/yr [Hanson and Lettis, 1994; Hall and others, 1994] and <6-9 mm/yr Weber [1981] VLBI rate of broad zone 3.1 ± 0.8 mm/yr [Feigl and others, 1993]
A6
Sargent
Creep rate is  3 mm/yr [Prescott and Burford, 1976] over southern ~1/3 of fault; northern 2/3 converges with San Andreas fault at depth thus may not be independent source of earthquakes
A7
San Andreas, creeping zone
Creep releases most strain.  No M>6 events observed historically between Parkfield and San Juan Bautista (T. Toppozada, oral communication, 1996). Possible M>6 covered as background, not as discrete sources
C1
Southern Calaveras, creeping zone
130-km-long creeping zone has longterm slip rate similar to creep rate.  Use 1984 Morgan Hill earthquake [Oppenheimer and others, 1990] as characteristic event
C2
Northern Calaveras, entire
6 mm/yr rate on small geodetic net at Calaveras Reservoir [Prescott and Lisowski, 1983]; 5 mm/yr geologically [Kelson and others, 1996].  Maximum rate, north Calaveras fault system, 8 mm/yr near Covelo (see C7). Oppenheimer and Lindh [1993]
C2a
No. Calaveras, Amador Valley
A M5.7 earthquake occurred in this area in 1864, but it could equally well have occurred on the Hayward or other flts. Mostly straight segment steps right at Sunol Valley. Simpson and others [1993], Oppenheimer and Lindh [1993]
C2b
No. Calaveras, San Ramon Vy.
A rupture accompanying the M5.6 (±0.5), 1861 earthquake extended 13 km from present-day Elworthy Ranch [Rogers and Halliday, 1993] to Amador Valley. SE end matches a right-step at Dublin canyon. Simpson and others [1993], Oppenheimer and Lindh [1993]
C3
Concord
Rate at depth assumed 6 mm/yr interpolated from Calaveras Reservoir geodetic net and Green Valley creep rate of Galehouse [1995] Preliminary minimum of 6 mm/yr [Simpson and others, 1995]
C34
Concord-Green Valley
Creep rate  3-6 mm/yr  north of Calaveras Reservoir [Galehouse, 1995], but ~8 mm/yr near Covelo (C7) 1985-1989 (Lisowski and Prescott,1989; M. H. Murray, unpub. data, 1996)
C4
Green Valley
Rate assumptions same as for northern Calaveras and Concord.  North end based on change in strike and gap in seismicity
C5
Hunting Creek-Berryessa
Segmentation determined by recognition of major changes in strike of surface faults and termination of microseismic zone
C6
Bartlett Springs
Northward of this segment, surface-faulting is obscure or poorly known and microseismicity is much more diffuse.  Fault may dip northeast [Castillo and Ellsworth, 1993]
C7
Round Valley
Holocene traces obscure and low microseismicity. Trilateration 1985-1989 shows ~8 mm/yr creep rate near Covelo (Lisowski and Prescott, 1989; M. H. Murray, unpub. data, 1996)
C8
Lake Mountain
Similar arguments and problems to Round Valley fault (Calaveras fault system) to SE and Garberville-Briceland fault zone (Hayward fault system) to the SW
GV01
Great Valley_01
R
Source centered on Sites anticline near Willows.  MTJ slab active here below at 15~30 km depth.  Coalinga (GV13) analog used (CAU), except rate is order of magnitude slower [Unruh and others, 1995]
GV02
Great Valley_02
Centered on Cortina Thrust of Unruh and others [1995].  Coalinga analog used, except lower shortening rate similar to GV01
GV03
Great Valley_03
Geomorphic expression of Sweitzer and Dunnigan Hills faults suggests Holocene activity [Unruh and Moores, 1992]. Segment extends length of Rumsey Hills antiform.  Coalinga analog used
GV04
Great Valley_04
Probable general source region of 1892 M~6.5 earthquake in Winters-Vacaville area, but details highly uncertain [Unruh and Moores, 1992]  Coalinga analog used
GV05
Great Valley_05
Poorly understood but structurally distinct segment adjacent to lowest Coast Ranges and Montezuma Hills. May interact with possible surface faults: Vaca? [Knuepfer, 1977] and Pittsburg [McCarthy and others, 1995] with events to 28 km depth
GV06
Great Valley_06
Segment associated with the greater Mount Diablo regional antiform.  Midway fault uplift rates [Clark and others, 1984] consistent with Coalinga analog assumption
GV07
Great Valley_07
Segment parallels major folds and San Joaquin fault zone of Lettis [1982]. Late Quaternary uplift rate similar range to Coalinga [Clark and others, 1984; Sowers and others, 1993]  CAU
GV08
Great Valley_08
Similar to GV07 and GV09, but hanging wall a major homoclinal segment. Right step in range front possible internal segment boundary [Wakabayashi and Smith, 1994]  CAU
GV09
Great Valley_09
Distinct homoclinal segment bounded by San Joaquin fault (steep backthrust?) on northeast and Ortigalita (strike-slip) fault on southwest, and bedding slip on O'neill fault zone
GV10
Great Valley_10
Another distinct homoclinal segment, but no published evidence of Quaternary faulting and folding.  Coalinga analog used (CAU)
GV11
Great Valley_11
Segment associated with NE-dipping flank of major anticline.  Extent of likely earthquake (e.g., 1885 M~6.5) to SE difficult to predict because of curvature in structure.  CAU
GV12
Great Valley_12
Northward continuation of Coalinga-New Idria NE flank, but no aftershocks here in 1983. Indistinct boundary to next segment, GV11.  May be shorter [Wakabayashi and Smith, 1994]  CAU
GV13
Great Valley_13
Coalinga 1983: moment, slip rate and slip model consistent with Stein and Ekstrom [1992]. Segment length from aftershock zone consistent with anticlinal and geomorphic segmentation
GV14
Great Valley_14
North Kettleman Hills segment, M 6.1 event in 1985, but area formula of Wells and Coppersmith [1994] gives M 6.4. Event had much less slip or rigidity is much lower than the Coalinga 1983 M6.5 event
H1
Hayward, south
Uniform model of south segment, not 1868 event, see text. Slip from Yu and Segall [1996]; slip rate of Lienkaemper and Borchardt [1996]
H1a
Hayward, Southeast Extension
Right-lateral slip rate limited by high rates on adjacent C1 segment and assumed major slip junction of H1 and C1.  We neglect a significant, but unknown proportion of dip slip assuming it makes a minor addition to moment
H2
Hayward, north
Uniform model of north segment, not 1836? event, see text. Slip from Yu and Segall [1996]; slip rate of Lienkaemper and Borchardt [1996]
H3
Rodgers Creek
South end after Williams and others [1997]  Slip and recurrence from Schwartz and others [1993] and slip rate from Hayward fault zone
H4
Maacama, south
North endpoint is major (15¡) bend.  Sources in this zone: H4, H5, H6 and H7 assume slip of ~2 m like slip on better known Hayward and Rodgers Creek fault segments
H5
Maacama, central
North end gap and slight bend in Jennings [1992] mapping--tentative segment boundary. Creep rate in Ukiah 6.9 ± 1.4 mm/yr [Galehouse, 1995]
H6
Maacama, north
Creep rate at Willits is 7.3 ± 0.7 mm/yr [Galehouse, 1995]  North segment boundary (H. M. Kelsey, written commun., 1995) at end of mapped Quaternary faults on Jennings [1992] map and end of microseismic activity
H7
Garberville-Briceland
NW end of the fault near the transitional Cascadian boundary.  Microearthquakes deepen north of here.  Geodetic data indicate dextral strain still high this far north (Lisowski and Prescott [1989]; M. H. Murray, unpub.data, 1996)
L01
Rinconada
Late Cenozoic rates, 2-4 mm/yr [Hart and others, 1986], plate model allows 2 mm/yr, but geomorphic evidence suggests <1 mm/yr
L02
Greenville
Greenville fault probably limited to ~10 km of slip since >5 Ma based on offset serpentinite body (<2 mm/yr) or slip possibly began 3.5 Ma (<3 mm/yr); Minimum rate [Wright and others, 1982]
L03
Ortigalita
Detailed study [Anderson and others,1982] depended mostly on soil dating for rates and recurrence conclusions. Shorter segments reasonable but in conflict with long recurrence. La Forge and Lee [1982]; Clark and others [1984]
L04
Monterey Bay-Tularcitos
Order of magnitude slip rate based on >1 m slip needed to recognize Holocene in offshore data and 10 m of Holocene offset not apparent onshore
L05
West Napa
Slip rate based on recognizable Holocene geomorphic expressions and regional strain book-keeping---needs checking
L06
Quien Sabe
Mb 5.2 (1986) may be typical event (D. H. Oppenheimer, written commun., 1995)  Range of slip rate mainly judged from Holocene geomorphic features that appear distinct enough that larger, infrequent events might occur (W. A. Bryant, oral commun., 1996)
L07
Monte Vista-Shannon
Length from Jennings [1992] map. Slip rates and dip (45 ± 5¡) from Hitchcock and others [1994]. Mean width given as fault intersects San Andreas segments at a range of depths, maximum on A3 at 18 km and  minimum on A2 at 3 km
L08
Collayomi
See also Big Valley fault in Clark and others [1984] for slip rate discussion. Segment is slightly longer than well-defined surface zone to reflect probable longer subsurface events
L09
Point Reyes
1.4 km vertical slip on granite since late Miocene or after early Pliocene [McCulloch,1987]. Steep reverse to thrust at depth
L10
Zayante-Vergeles
RL-R
Rake in trench ~55¡, thus dip-slip > strike-slip [Coppersmith, 1979].  Dip, highly variable, to SW away from San Andreas. Slip rates of Clark and others [1984]. Vertical, strike-slip style dominates near south end (D. Oppenheimer, writ.comm.,1995)
NE01
Honey Lake
Eastern branch of eastern Sierra Nevada-Great Basin (SNGB) dextral shear zone. Recurrence time and slip rate ~2 mm/yr of Wills and Borchardt [1993] on main trace; maximum rate from VLBI data (D. F. Argus, written commun., 1995); Nuvel-1A [DeMets, 1995]
NE02
Mayfield-McArthur-Hat Creek
N-RL
Assumes branches of SNGB dextral shear zone converge with combined rate less amount lost to Likely fault and areal source,  NE12.  Capable of event similar to 1954 Fairview Peak M7.1.  Rates from: microplate model, Muffler [1994] and Wills [1991]
NE03
Gilem-Big Crack
Part of SNGB dextral shear assumed to be on Cedar Mtn fault system,  some slip assumed to pass northward through Medicine Lake volcano aseismically, re-emerging on Gillem fault.  No local slip vector data used
NE04
Cedar Mtn
No local control on rates from VLBI.  Assume some of Hat Creek fault system slip passes northward through Medicine Lake Volcano to emerge on eastern margin of Klamath Lakes graben.  Microplate model suggests 4-5 mm/yr RL across Klamath Lakes graben
NE05
Surprise Valley
N
Slip rate and dip from Clark and others [1984] and Hedel [1980]
NE06
Likely
Slip rate based on minor (<5 m?) offset to Lahontan-age shoreline on Madeline Plain by fault (W. A. Bryant, oral comm., 1996)
NE07
Goose Lake
Rate from Pezzopane [1993]
NE08
Battle Creek
Length for whole zone. Mw, slip, area and recurrence for assumed largest event. Areal source polygon: -120.0 40.4, -121.5 40.4,-122.5 42.5, -120.5 42.5
NE09
northeastern Calif., areal sour
Areal source: -119.7, 40.15; -120.0, 40.4; -120.5 42.5; -122.5, 42.5; -121.5, 40.4; -120.5, 39.5. Length for whole zone. Mw, slip, area and recurrence for assumed average large event
NE10
Mohawk-Honey Lake, areal source
Length for whole zone. Mw, slip, area and recurrence for assumed largest event. Areal source polygon: -120.0  40.4, -121.5  40.4, --121.19 39.84, -120.815 39.65, -120.5  39.5, -119.7  40.15
NE11
Foothills fault zone, areal source
Float a M6.5 [Schwartz and others, 1996] Slip rate [Clark and others, 1984] Areal source polygon: -122.16 40.24, -121.865 40.37, -121.63 40.055, -121.19 39.84, -120.815 39.65, -120.7 38.395, -120.05 37.275, -120.78 38.08, -121.085 38.62, -121.13 38.84
NE12
western Nevada, areal source
Length for whole zone. Mw, slip, area and recurrence for assumed largest event. Areal source polygon: -120.5, 39.5, -119.7, 40.15, -118.11 38.0, -119.15 38.0, -120.1  39.0