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Organization Title

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

C ZONES

Foothills Fault System

Foothills Fault System
(n-rl-o, 75 E)
360 36 0.05 0.03 P 6.5 0.00103 974 12 2 0 12 -90 75 55 n/a n/a Poorly constrained composite late Quaternary slip rate across Bear Mtn. and Melones flt zones (Woodward-Clyde Consultants, 1978; Clark, et al., 1984; PG&E, 1994). Areal source model assumes a maximum magnitude earthquake of 6.5.
 

NORTHEASTERN CALIFORNIA

Mohawk-Honey Lake Zone
(rl-ss)
88 9 2.00 1.00 P 7.3 0.00079 1263 15 2 0 15 180 90 45 n/a n/a Distributed dextral shear zone carried from Western Nevada Zone.
Rate for NE CA
(rl-ss)
230 23 4.00 2.00 P 7.3 0.00414 242 15 2 0 15 180 90 65 n/a n/a Distributed dextral shear of Sierra Nevada-Great Basin shear zone, based on VLBI data (Argus & Gordon, 1991; Argus (p.c. to J. Lienkaemper, 1995). Model weighted 50%.
  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.