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a faults 

CALIFORNIA DEPARTMENT OF CONSERVATION
DIVISION OF MINES AND GEOLOGY
OPEN-FILE REPORT 96-08

U.S. DEPARTMENT OF THE INTERIOR
U.S. GEOLOGICAL SURVEY OPEN-FILE REPORT 96-706

 

APPENDIX A

CALIFORNIA FAULT PARAMETERS

FAULT NAME AND GEOMETRY
(ss) strike slip, (r) reverse, (n) normal
(rl) rt. lateral, (ll) left lateral, (o) oblique 		LENGTH
(km) 		SLIP
RATE
(mm/yr) 		RANK
(1) 		Mmax
(2)		 CHAR.
RATE
(events/yr) 		R.I.
(3) 		Down dip
Width
(km)(4) 		ruptop
(5)		 rupbot
(6) 		rake dip daz
(7) 		Endpt N Endpt S

COMMENTS

A FAULTS

SAN ANDREAS FAULT ZONE

San Andreas - Coachella
(rl-ss)		 95 10 25.00 5.00 P 7.1 0.00000 n/a 12 2 0 12 180 90 0 -116.48; 33.92 -115.71; 33.35 Slip rate based on Sieh and Williams (1990); Sieh (1986); Keller et al. (1982); Bronkowski (1981). Model assumes slip only in S. San Andreas events.
San Andreas - San Bernardino
(rl-ss) 		107 11 24.00 6.00 M 7.3 0.00231 433 18 2 0 18 180 90 0 -117.53; 34.31 -116.48; 33.92 Slip rate reported by Weldon and Sieh (1985).
San Andreas (southern)
(rl-ss) 		203 20 24.00 6.00 P 7.4 0.00454 220 12 2 0 12 180 90 0 -117.53; 34.31 -115.71; 33.35 Rupture of San Bernardino and Coachella segments. Slip rate based on Coachella segment.
San Andreas - Mojave
(rl-ss) 		99 10 30.00 7.00 P 7.1 0.00182 550 12 2 0 12 180 90 0 -118.50; 34.70 -117.53; 34.31 Slip rate based on Sieh (1984), Salyards et al. (1992), and WGCEP (1995).
San Andreas - Carrizo
(rl-ss) 		145 15 34.00 3.00 W 7.2 0.00000 n/a 12 2 0 12 180 90 0 -119.86; 35.31 -118.51; 34.70 Slip rate based on Sieh and Jahns (1984). Model assumes slip only in 1857-type events.
San Andreas - Cholame
(rl-ss) 		62 6 34.00 5.00 P 6.9 0.00229 437 12 2 0 12 180 90 0 -120.29; 35.75 -119.86; 35.31 Slip rate based on analogy with Carrizo segment.
San Andreas Parkfield Segment
(rl-ss)		 37 4 34.00 5.00 P 6.7 0.04060 25 12 2 0 12 180 90 0 -120.56; 36.00 -120.29; 35.75 Slip rate reported by WGCEP (1995).
San Andreas (1857 rupture)
(rl-ss) 		345 35 34.00 5.00 W 7.8 0.00485 206 12 2 0 12 180 90 0 -120.56; 36.00 -117.53; 34.31 Rupture of Parkfield, Cholame, Carrizo, and Mojave segments. Max. magnitude based on 1857 event (Ellsworth, 1990). Slip rate based on Carrizo segment.
San Andreas (creeping segment)
(rl-ss) 		125 13 34.00 5.00 P * 0.00000 n/a 12 2 0 12 180 90 0 -121.51; 36.82 -120.56; 36.00 Background seismicity.
San Andreas (Pajaro)
(rl-ss) 		22 2 14.00 3.00 P 6.8 0.00000 n/a 18 2 0 18 180 90 0 -121.69; 36.95 -121.51; 36.82 Pajaro segment assumed to rupture only in 1906-type events. Max. magnitude based on 1.6 m displacement.
San Andreas (Santa Cruz Mtn)
(rl-ss) 		37 4 14.00 3.00 P 7.0 0.00250 400 18 2 0 18 180 90 0 -122.00; 37.18 -121.69; 36.95 Slip rate based on Lienkaemper, et al. (1991) and assumption that 3 mm/yr rate transferred to Sargent fault. Max. magnitude based on 1.6 m displacement.
San Andreas (Peninsula)
(rl-ss) 		88 9 17.00 3.00 M 7.1 0.00250 400 14 2 0 14 180 90 0 -122.60; 37.81 -122.00; 37.18 Slip rate is based on Clahan, et al. (1995) and assumptions by WGNCEP (1996). Max. magnitude based on 1.6 m displacement.
San Andreas (North Coast)
(rl-ss) 		322 32 24.00 3.00 M 7.6 0.00000 n/a 12 2 0 12 180 90 0 -124.41; 40.25 -122.59; 37.82 Assumption that North Coast segment ruptures only in 1906-type events. Slip rate based on Niemi and Hall (1992) and Prentice, et al, (1991).
San Andreas (1906)
(rl-ss) 		470 47 24.00 3.00 M 7.9 0.00476 210 12 2 0 12 180 90 0 -124.41; 40.25 -121.51; 36.82 Slip rate based on Niemi and Hall (1992) and Prentice, et al (1991). Assumption that 1906 events rupture North Coast, Pennisula, and Santa Cruz Mtns. segments to San Juan Bautista. Max. magnitude based on 1906 average 5 m displacement (WGCEP, 1990; Lienkaemper, 1996).
 

SAN JACINTO - IMPERIAL FAULT ZONE

Imperial
(rl-ss) 		62 6 20.00 5.00 M 7.0 0.01258 79 12 2 0 12 180 90 0 -115.57; 32.91 -115.17; 32.47 Slip rate based on study by Thomas and Rockwell (1996). Max. magnitude based on M 6.9 event that occurred in 1940 (Ellsworth, 1990).
Superstition Hills
(rl-ss) 		22 2 4.00 2.00 P 6.6 0.00400 250 12 2 0 12 180 90 0 -115.84; 33.01 -115.64; 32.89 Slip rate and fault length reported by WGCEP (1995). Max. magnitude based on 1987 Superstition Hills earthquake (Wells and Coppersmith, 1994).
Superstition Mountain
(rl-ss) 		23 2 5.00 3.00 M 6.6 0.00200 500 12 2 0 12 180 90 0 -115.92; 33.99 -115.70; 32.89 Slip rate based on Gurrola and Rockwell (1996). Max. magnitude earthquake based on 1968 Borrego Mtn. earthquake (Wells and Coppersmith, 1994).
San Jacinto - Borrego
(rl-ss) 		29 3 4.00 2.00 M 6.6 0.00571 175 12 2 0 12 180 90 0 -116.19; 33.20 -115.98; 33.01 Slip rate and fault length reported by WGCEP (1995).
San Jacinto - Coyote Creek
(rl-ss) 		40 4 4.00 2.00 M 6.8 0.00571 175 15 2 0 15 180 90 0 -116.51; 33.46 -116.19; 33.20 Slip rate and fault length reported by WGCEP (1995).
San Jacinto - Anza
(rl-ss) 		90 9 12.00 6.00 M 7.2 0.00400 250 18 2 0 18 180 90 0 -116.92; 33.74 -116.12; 33.26 Slip rate and fault length reported by WGCEP (1995).
San Jacinto - San Jacinto Valley
(rl-ss) 		42 4 12.00 6.00 P 6.9 0.01205 83 18 2 0 18 180 90 0 -117.24; 34.02 -116.92; 33.74 Slip rate and fault length reported by WGCEP (1995).
San Jacinto - San Bernardino
(rl-ss) 		35 4 12.00 6.00 P 6.7 0.01000 100 15 2 0 15 180 90 0 -117.51; 34.25 -117.24; 34.02 Slip rate and fault length reported by WGCEP (1995).
 

ELSINORE FAULT ZONE

Laguna Salada
(rl-ss) 		67 7 3.50 1.50 M 7.0 0.00297 336 15 2 0 15 180 90 0 -115.88; 32.73 -115.40; 32.29 Slip rate reported by Mueller and Rockwell (1995).
Elsinore-Coyote Mountain
(rl-ss) 		38 4 4.00 2.00 M 6.8 0.00160 625 15 2 0 15 180 90 0 116.36; 32.97 -116.01; 32.78 Slip rate and fault length reported by WGCEP (1995).
Elsinore-Julian
(rl-ss)		 75 8 5.00 2.00 P 7.1 0.00294 340 15 2 0 15 180 90 0 -117.01; 33.38 -116.36; 32.97 Slip rate and fault length reported by WGCEP (1995).
Elsinore-Temecula
(rl-ss) 		42 4 5.00 2.00 M 6.8 0.00417 240 15 2 0 15 180 90 0 -117.35; 33.64 -117.01; 33.34 Slip rate and fault length reported by WGCEP (1995).
Elsinore-Glen Ivy
(rl-ss) 		38 4 5.00 2.00 M 6.8 0.00294 340 15 2 0 15 180 90 0 -117.64; 33.85 -117.35; 33.64 Reported slip rates vary from 3.0-7.2 (Millman and Rockwell, 1986)
Whittier
(rl-ss) 		37 4 2.50 1.00 M 6.8 0.00156 641 15 2 0 15 180 90 0 -118.02; 33.97 -117.64; 33.85 Slip rate based on Rockwell et al. (1990); Gath et al. (1992) description of offset drainage.
 

HAYWARD - RODGERS CRK FAULT ZONE

Hayward (total length)
(rl-ss) 		86 9 9.00 1.00 M-W 7.1 0.00600 167 12 2 0 12 180 90 0 -122.41; 38.05 -121.81; 37.45 Well constrained slip rate for southern segment reported by Lienkaemper, et al. (1995) and Lienkaemper and Borchardt (1996). Recurrence (167 yrs) and slip per event (1.5 m) are based on WGCEP (1990). Model weighted 50%.
Hayward (south)
(rl-ss) 		43 4 9.00 1.00 W 6.9 0.00600 167 12 2 0 12 180 90 0 -121.13; 37.73 -121.81; 37.45 Well constrained slip rate reported by Lienkaemper, et al. (1995) and Lienkaemper and Borchardt (1996). Recurrence (167 yrs) and slip per event (1.5 m) are based on WBCEP (1990). The southern segment can be projected to Calaveras fault along prominent zone of seismicity. Net slip rate of 9mm/yr can be resolved into 3mm/yr vertical and 7.6mm/yr r.l. along postulated Mission Link blind thrust of Andrews, et al (1992) along this southern connection. Model weighted 50%.
Hayward (north)
(rl-ss)		 43 4 9.00 1.00 M 6.9 0.00600 167 12 2 0 12 180 90 0 -122.41; 38.05 -122.13; 37.73 Well constrained slip rate for southern segment reported in Lienkaemper, et al. (1995) and Lienkaemper and Borchardt (1996). Recurrence (167 yrs) and slip per event (1.5 m) are based on WGCEP (1990). Model weighted 50%.
Rodgers Creek
(rl-ss) 		63 6 9.00 2.00 M 7.0 0.00450 222 10 2 0 10 180 90 0 -122.77; 38.54 -122.34; 38.09 Slip rate is composite of slip rate reported by Schwartz, et al. (1992) and slip rate from Hayward fault (Lienkaemper and Borchardt, 1996). Recurrence (222yrs) and slip per event (2.0 m) are based on WGCEP (1990).
  1. W — well-constrained slip rate; M — moderately constrained slip rate; P — poorly constrained slip rate; U — unconstrained slip rate.
  2. Maximum moment magnitude calculated from relationships (rupture area) derived by Wells and Coppersmith (1984).
  3. R.I. — recurrence interval.
  4. Down-dip width = (rupture bottom minus rupture top) divided by sine of dip angle.
  5. Top of rupture.
  6. Bottom of rupture.
  7. daz — dip azimuth.

This report is preliminary and has not been reviewed for conformity with U.S. Geological Survey editorial standards or with the North American Straigraphic Code. Any use of trade, product or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government.