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CGS > Regional Geologic Hazards and Mapping Program > PSHA > Ofr9608

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

B FAULTS

ELSINORE AND SAN JACINTO FAULT ZONES (NON A FAULTS)

Brawley Seismic Zone
(rl-ss) 		42 4 25.00 5.00 P 6.4 0.04231 24 6 2 2 8 180 90 0 -115.71; 33.35 -115.51; 32.96 Slip rate and fault length reported by WGCEP (1995).
Chino - Central Ave.
(rl-r-o) (65 SW) 		28 3 1.00 1.00 U 6.7 0.00113 882 17 2 0 15 180 65 225 -117.75; 34.03 -117.57; 33.83 Unconstrained slip rate based on assumptions of slip transfer between Elsinore and Whittier faults.
Earthquake Valley
(rl-ss) 		20 2 2.00 1.00 U 6.5 0.00285 351 15 2 0 15 180 90 0 -116.58; 33.18 -116.41; 33.08 Slip rate based on Rockwell (p.c. 1996).
Elmore Ranch
(ll-ss) 		29 3 1.00 0.50 M 6.6 0.00444 225 12 2 0 12 0 90 0 -115.66; 33.23 -115.85; 33.03 Late Holocene slip rate based on Hudnut, et al. (1989). Fault length includes eastward extent of zone of seismicity.
 

GARLOCK FAULT ZONE

Garlock - west
(ll-ss) 		97 10 6.00 3.00 P 7.1 0.00100 1000 12 2 0 12 0 90 0 -118.92; 34.83 -118.01; 35.27 Slip rate based on offset late Qt. stream channel (McGill, 1994; p.c. 1996). We use a 1ka recurrence, based on 700-2700 yr recurrence reported by McGill.
Garlock-east
(ll-ss) 		155 16 7.00 2.00 M 7.3 0.00100 1000 12 2 0 12 0 90 0 -118.02; 35.29 -116.39; 35.60 Slip rate based on McGill and Sieh (1993). Average recurrence of about 1ka, based on McGill and Sieh (1991).
Owl Lake
(ll-ss) 		25 3 2.00 1.00 M 6.5 0.00200 500 12 2 0 12 0 90 0 -116.64; 35.73 -116.88; 35.61 Slip rate based on offset stream channel. Timing of offset based on radio-carbon and rock varnish dating of alluviual fan surface reported by McGill (1993).
 

SAN GREGORIO-HOSGRI FAULT ZONE

Hosgri
(rl-ss)		 172 17 2.50 1.00 M-P 7.3 0.00155 646 12 2 0 12 180 90 0 -121.73; 36.15 -120.69; 34.86 Slip rate based on San Simeon fault slip rate reported in Hanson and Lettis (1994).
San Gregorio (Sur region)
(rl-ss) 		80 8 3.00 2.00 P 7.0 0.00244 411 12 2 0 12 180 90 0 -122.16; 36.81 -121.74; 36.18 Late Qt. slip rate of 1-3 mm/yr based on assummed transfer of slip from Hosgri flt. Slip rate from San Simeon flt. (Hanson and Lettis (1994) and Hall et al (1994)..
San Gregorio
(rl-ss) 		129 13 5.00 2.00 P 7.3 0.00250 400 15 2 0 15 180 90 0 -122.67; 37.89 -122.13; 36.81 Weber and Nolan (1995) reported Holocene slip rate of 3-9mm/yr; latest Pleistocene slip rate of 5 mm/yr (min) and lt. Qt. slip rate of about 4.5mm/yr reported by Simpson, et al. (written communication to J. Lienkaemper, 1995).
 

CALAVERAS FAULT ZONE

Calaveras (s. of Calaveras Reservoir)
(rl-ss) 		106 11 15.00 2.00 P-M 6.2 0.03030 33 5 2 5 10 180 90 0 -121.79; 37.43 -121.18; 36.62 Includes Paicines fault south of Hollister. Slip rate is composite based on slip rate for a branch of Calaveras fault reported by Perkins & Sims (1988) and slip rate of Paicines fault reported by Harms, et al. (1987). Creep rate for fault zone approximately 15 mm/yr. Maximum earthquake assumed to about 6.2 (Oppenheimer, et al., 1990).
Calaveras (north of Calaveras Reservoir)
(rl-ss)		 52 5 6.00 2.00 M 6.8 0.00684 146 13 2 0 13 180 90 0 -122.03; 37.86 -121.81; 37.45 Slip rate based on composite of 5mm/yr rate reported by Kelson, et. al. (1996) and 6mm/yr creep rate from small geodetic net reported by Prescott and Lisowski (1983).
 

SAN DIEGO AREA

Coronado Bank
(rl-ss) 		185 19 3.00 1.00 P 7.4 0.00153 653 13 2 0 13 180 90 0 -117.93; 33.27 -116.84; 31.89 Slip rate for Palos Verdes fault assummed to extend to SE along Coronado Bank flt.
Newport-Inglewood (offshore)
(rl-ss) 		66 7 1.50 0.50 P 6.9 0.00154 651 13 2 0 13 180 90 0 -117.91; 33.60 -117.43; 33.16 Slip rate based on assumption that slip from Rose Canyon zone transfers to offshore Newport-Inglewood (WGCEP, 1995).
Rose Canyon
(rl-ss) 		55 6 1.50 0.50 M 6.9 0.00128 781 13 2 0 13 180 90 0 -117.42; 33.13 -117.13; 32.71 Mininum slip rate reported by Lindvall and Rockwell (1995).
  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.