Creep Site Information Table

To view creep data plots and access more site information (site descriptions, maps, and photos) click on the site number.

You can also access creep data plots and more site information from our Map of Creep Measurement Sites.

Creep measurement errors (standard deviations), and critical creep site data (e.g., IS-ES distances) for all sites (1979-2001) are included in Galehouse (2002; http://geopubs.wr.usgs.gov/open-file/of02-225/)
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Site Number
Fault
WG99 Fault Segment Code
Site Name
Longitude
Latitude
Date of Initial Measurement
Brief Description of Creep Behavior
CV1 Calaveras
CN
Corey Place
-121.9598
37.74580
23-Nov-1980

site noise; ~no creep prior to 1993; ~2.9 mm/yr creep rate since 1993

CV2 Calaveras
CN
Welch Creek Road
-121.8508
37.53580
24-Jan-1997
site noise; ~4.3 mm/yr creep rate since 1997
CV3 Calaveras
CC
Coyote Ranch
-121.5242
37.06990
3-May-1968
~17.6 mm/yr creep rate since 1968; largest creep rate of all Bay Area sites
CV4 Calaveras
CS
Wright Road
-121.4128
36.86990
21-Oct-1979
somewhat episodic creep prior to 1989 Loma Prieta earthquake (LPE); triggered slip associated with LPE (Galehouse, 1990); no creep for 4 yrs following LPE (stress shadow effect?); steady state creep rate of 9.9 mm/yr since 1993
CV5 Calaveras
CS
Seventh Street
-121.4053
36.84960
29-Sep-1979
generally episodic creep; average rate of 6.6 mm/yr since 1980; triggered slip associated with LPE (Galehouse, 1990, 1997) followed by ~ 4 yrs of slower steady-state creep
C1 Concord
CON
Salvio Street
-122.0372
37.97580
30-Sep-1979
episodic creep rate of 2.8 mm/yr since 1980; intervals between creep events from 3-5 yrs
C2 Concord
CON
Ashbury Drive
-122.0342
37.97200
28-Sep-1979
site noise; 3.7 mm/yr creep rate since 1980
GV1 Green Valley
GVS
Red Top Road
-122.1495
38.19860
15-Jun-1984
noisy, steady-state(?) signal; ~3.9 mm/yr since 1984
H1 Hayward
HN
Contra Costa College
-122.3381
37.96920
10-Aug-1980
noisy, steady-state creep rate of 4.9 mm/yr since 1980
H2 Hayward
HN
Thors Bay Road
-122.2919
37.92460
30-Sep-1989
noisy, steady-state(?) creep rate of 3.6 mm/yr since 1990
H3 Hayward
HN
LaSalle Ave
-122.2091
37.82650
10-Feb-1993
noisy, steady-state creep rate of 3.8 mm/yr since 1993
H4 Hayward
HS
Encina Way
-122.1505
37.75460
10-Sep-1989
noisy, steady-state creep rate of 2.8 mm/yr since 1990
H5 Hayward
HS
Rose Street
-122.0900
37.67980
24-Jun-1980
somewhat noisy, steady-state creep rate of 4.9 mm/yr since 1980
H6 Hayward
HS
D Street
-122.0805
37.67030
23-Jun-1980
steady-state creep rate of 4.4 mm/yr since 1980
H7 Hayward
HS
Appian Way
-122.0009
37.59250
23-Sep-1979
somewhat noisy, steady-state creep rate of 5.5 mm/yr since 1980
H8 Hayward
HS
Rockett Drive
-121.9608
37.54220
22-Sep-1979
site noise, steady-state(?) creep rate of 5.0 mm/yr since 1980; noticibly slower rate for ~ 3 yrs following 1989 LPE (e.g., Lienkaemper et al., 1997, 2001)
H9 Hayward
HS
Camellia Drive
-121.9343
37.51250
11-Feb-1990
~no creep from 1990 to 1996 punctuated by large creep episode, then ~no creep from 1996-1999, then steady-state creep rate of 5.0 mm/yr since 1999
H10 Hayward
HS
Parkmeadow Drive
-121.9317
37.50980
5-Apr-1992
remarkably similar to H9, though somewhat noisier signal; steady-state creep rate of 6.4 mm/yr since 1999
M1 Maacama
W. Commercial Ave
-123.3559
39.41250
14-Nov-1991
steady-state creep rate of 6.5 mm/yr since 1992
M2 Maacama
Sanford Ranch Road
-123.1664
39.13920
22-May-1993
site noise; steady-state creep rate of ~4.6 mm/yr since 1993
RC1 Rodgers Creek
RC
Solano Drive
-122.6934
38.43700
18-Aug-2002
short data record; suggestion of ~4.3 mm/yr creep rate since 2002
RC2 Rodgers Creek
RC
Sonoma Mtn. Rd
-122.5894
38.30940
14-Mar-2004
recently reestablished site; no data currently available
SA1 San Andreas
SAN
Alder Creek
-123.6895
39.00000
9-Jan-1981
site noise: little or no creep since 1980
SA2 San Andreas
SAN
Point Reyes
-122.7969
38.04410
4-Feb-1985
site noise; apparently no creep since 1985
SA3 San Andreas
SAP
Duhallow Way
-122.4646
37.64430
23-Mar-1980
site noise; apparently no creep since 1980
SA4 San Andreas
SAP
Roberta Drive
-122.2605
37.41710
4-Nov-1989
site noise; suggestion of ~0.5 mm/yr; increasing rate since 1999?
SA5 San Andreas
SAP
Searle Road
---
---
12-Oct-2002
apparently no creep since 2002
SA6 San Andreas
SAS
Cannon Road
-121.5851
36.88270
18-Nov-1989
site noise; essentially no creep between 1989 and 1998
SA7 San Andreas
SAS
Mission Vineyard Rd
-121.5207
36.83510
21-Jul-1990
steady state creep rate of 10.7 mm/yr since 1990
SG1 San Gregorio
SGN
West Point Ave
-122.4956
37.50380
9-Nov-1979
site noise; no creep since 1980
SG2 San Gregorio
SGN
Pescadero Road
-122.3719
37.25460
20-May-1982
site noise; suggestion of 0.7 mm/yr since 1983
W1 West Napa
Linda Vista Ave
-122.3393
38.33530
---
 currently abandoned site

References

Galehouse, J.S. (1990). Effect of Loma Prieta earthquake on surface slip along the Calaveras fault in the Hollister area, Geophys. Res. Lett. 17, 1219-1222.

Galehouse, J.S. (1997). Effect of Loma Prieta earthquake on fault creep rates in the San Francisco Bay region, U.S. Geol. Surv. Prof. Pap. 1550-D, D193-D207.

Galehouse, J.S. (2002). Data from theodolite measurements of creep rates on San Francisco Bay region faults, California: 1979-2001: U.S. Geol. Surv. Open-File Report 02-225, 94 pp. (http://geopubs.wr.usgs.gov/open-file/of02-225/).

Lienkaemper, J.J., J.S. Galehouse, and R.W. Simpson (1997). Creep response of the Hayward fault to stress changes caused by the Loma Prieta earthquake, Science 276, 2014-2016.

Lienkaemper, J.J., J.S. Galehouse, and R.W. Simpson (2001). Lon-term monitoring of creep rate along the Hayward fault and evidence for a lasting creep response to the 1989 Loma Prieta earthquake, Geophys. Res. Lett. 28, 2265-2268.
Working Group on California Earthquake Probabilities (WGCEP) (1999). Earthquake probabilitie in the San Francisco Bay region: 2000-2030 - A summary of findings, U.S. Geol. Surv. Open-File Rept. 99-517, 55 pp. (http://geopubs.wr.usgs.gov/open-file/of99-517/).