Data from Theodolite Measurements of Creep Rates on San Francisco Bay Region Faults, California, 1979-2009

By Forrest S. McFarland, James J. Lienkaemper, and S. John Caskey

Open-File Report 20091119

U.S. Department of the Interior U.S. Geological Survey

2

U.S. Department of the Interior KEN SALAZAR, Secretary

U.S. Geological Survey Suzette M. Kimball, Acting Director

U.S. Geological Survey, Reston, Virginia 2009

For product and ordering information: World Wide Web: http://www.usgs.gov/pubprod Telephone: 1-888-ASK-USGS

For more information on the USGSthe Federal source for science about the Earth, its natural and living resources, natural hazards, and the environment: World Wide Web: http://www.usgs.gov Telephone: 1-888-ASK-USGS

Suggested citation: McFarland, F.S., Lienkaemper, J.J., and Caskey, S.J., 2009, Data from theodolite measurements of creep rates on San Francisco Bay Region faults, California, 1979-2009: U.S. Geological Survey Open-File Report 2009-1119, 17 p. [http://pubs.usgs.gov/of/2009/1119/].

Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government.

Although this report is in the public domain, permission must be secured from the individual copyright owners to reproduce any copyrighted material contained within this report.

http://www.usgs.gov/pubprodhttp://www.usgs.govhttp://pubs.usgs.gov/of/2009/1119/]

3

Data from Theodolite Measurements of Creep Rates on San Francisco Bay Region Faults, California, 1979-2009

By Forrest S. McFarland, James J. Lienkaemper, and S. John Caskey

Introduction

Our purpose is to update our creep-data archive on San Francisco Bay region active faults with two additional years of data for use by the scientific research community. Earlier data (1979-2001) were reported in Galehouse (2002) and were analyzed and described in detail in a summary report (Galehouse and Lienkaemper, 2003). A complete analysis of our earlier results obtained on the Hayward Fault was presented in Lienkaemper, Galehouse and Simpson (2001). From 1979 until his retirement from the project in 2001, Jon Galehouse of San Francisco State University (SFSU) and many student research assistants measured creep (aseismic slip) rates on these faults. The creep measurement project, which was initiated by Galehouse, has continued through the Geosciences Department at SFSU from 2001-2006 under the direction of Karen Grove and John Caskey (Grove and Caskey, 2005) and by Caskey since 2006 (Caskey, 2007). Forrest McFarland has managed most of the technical and logistical project operations, as well as data processing and compilation since 2001. Data from 2001-2007 are found in McFarland and others (2007). Henceforth, we plan to release these data annually and publish detailed analyses of the data in future publications.

We maintain a project Web site (http://funnel.sfsu.edu/creep/) that includes the following information: project description, project personnel, creep characteristics and measurement, map of creep-measurement sites, creep-measurement site information, and data plots for each measurement site. Our most current, annually updated results are, therefore, accessible to the scientific community and to the general public. Information about the project can currently be requested by the public by an email link (fltcreep@sfsu.edu) found on our project Web site.

Methods

The amount of creep is determined by noting changes in angles between sets of measurements taken across a fault at different times. This triangulation method uses a theodolite to measure the angle formed by three fixed points to the nearest tenth of a second of arc (see fig.1 inset; Galehouse and Lienkaemper, 2003). For the first 14 years of measurements, the angle was measured 12 times on each measurement day; Since then, we have been measuring it eight times each day. The amount of slip between measurement days can be calculated trigonometrically using the change in average angle. The precision of the measurement method is such that we can detect with confidence any movement greater than 1-2 mm

http://funnel.sfsu.edu/creep/mailto:fltcreep@sfsu.edu

4

between successive measurement days. A discussion of errors, uncertainties, and seasonal variations can be found in Galehouse and Lienkaemper (2003).

Until 2007 we had regular measurement sites at 34 localities on active faults, and we include data from one site that had to be abandoned (SACR). These site locations are shown as triangles and site codes on the accompanying map (fig. 1) and are identified by name in table 1 and on the data sheets. In addition to the sites in the San Francisco Bay region, we had one measurement site on the San Andreas Fault in the Point Arena area, one on the Bartlett Springs Fault near Lake Pillsbury, and two on the Maacama Fault in Willits and east of Ukiah. In the past, we typically measured sites with a history of creep every two months and sites without a creep history about every three months. However, since the last report we have reduced the frequency of surveys at each site; which has allowed us to add nine new sites north of San Francisco Bay (fig. 1), including four sites on the Rodgers Creek and Maacama Fault system and five sites on the Green ValleyHunting CreekBartlett Springs Fault system.

In addition to our ten regular sites on the Hayward Fault, we established 22 additional Hayward Fault annual survey sites (shown by diamonds in figs. 1 and 2 and by name in the data sheets and in table 2). We began measuring each of these additional sites annually in 1994. In the future, the regular Hayward Fault sites will be measured only annually, too, unless significant earthquake activity occurs.

Data

Table 1 shows the least squares average rate of movement at each site, determined using linear regression, and the simple average rate, determined by dividing the total net right-lateral displacement by the total time measured. All measurement sites span a fault width of 57-289 m, except Sites GVRT and SGPR, which span a greater width because of site considerations. The fault width spanned is noted in table 1 and represents the distance from the theodolite on one side of a fault (IS, instrument station; fig. 1 inset) to a target on the other side (ES, end station). Angles are measured with respect to another target (OS, orientation station). All Hayward Fault sites are summarized in table 2. Data sheets for all sites are available in the data folder as a single PDF file. Each data sheet is identified in the upper left by site code and name. Hayward Fault sites are ordered from northwest to southeast using kilometer distances along the fault measured from Point Pinole (P, in Figure 2) using the grid in Lienkaemper (2006). These data are also available for downloading in the Excel format to facilitate analysis of the data at http://pubs.usgs.gov/of/2009/1119/ (SFBayRegion09.xls and HaywardFault09.xls). They are also available as tab-delimited raw data. Data for the previous reporting period (2007-2009) include the average angle and its 1- uncertainty. Also provided for each reading is the current site correction used; the sine of the angular difference between the fault azimuth and azimuth of the array (IS-ES). Each measurement of apparent slip must be divided by its site correction. The data include all 34 regular measurement sites, the 22 SFSU/USGS annual survey sites on the Hayward Fault, and the most recently installed sites for which more than one survey is now available. We show summary plots of the creep data by fault zone for the Calaveras Fault (figs. 3 and 4), Concord-Green Valley and Bartlett Springs Faults (fig. 5), Rodgers Creek and Maacama Faults (fig. 6), San Andreas and San Gregorio Faults (fig. 7) and Hayward Fault (figs. 8 and 9).

http://pubs.usgs.gov/of/2009/1119/

5

Acknowledgments

This project has been continuously funded since 1979 by various grants and contracts from the U.S. Geological Survey, National Earthquake Hazards Reduction Program (latest contract was 07HQAG0032). Special thanks go to the many student research assistants from San Francisco State University who have been instrumental in collecting these theodolite data since 1979. We are particularly grateful to Brett Baker, Beth Brown, Carolyn Domrose, Jessica Fadde, Carolyn Garrison, Oliver Graves, Theresa Hoyt, Leslie Pawlak, Jon Perkins, Jon Polly, Carl Schaefer, and Jim Thordsen, who each worked with us for more than three years. Thanks also to Bob Abrams, Chris Alger, Linda Bond, Denise Coutlakis, Lisa Garmin, Matt Harrigan, CJ Hayden, Kathleen Isaacson, Heather Lackey, Regan Long, Marina Mascorro, Dan McVanner, Barbara Menne, Nicole Peirce, Brian Pierce, Holly Prochaska, Anne Marie Scherer, Gary Schneider, Debra Smith, Leta Smith, William Hassett, and Robert Sas who have all served as theodolite operators. Additional thanks go to Theresa Hoyt for performing quality assurance on the recent data. Reviews by Dave Ponce and Bob Simpson also improved the consistency and clarity of the report.

References cited

Bryant, W.A., and Hart, E.W., 2007, Rupture hazard zones in CaliforniaAlquist-Priolo Earthquake Fault Zoning Act with index to earthquake fault zones maps: California Geological Survey Special Publication 42, 46 p., [available at ftp://ftp.consrv.ca.gov/pub/dmg/pubs/sp/SP42.PDF, last accessed June 25, 2009].

Caskey, S.J., 2007, Theodolite survey monitoring of fault creep on San Francisco Bay Region faults:

National Earthquake Hazards Reduction Program, Annual Project Summaries, v. 48, U.S. Geological Survey, [available at http://earthquake.usgs.gov/research/external/reports/07HQAG0032.pdf, last accessed June 25, 2009].

Galehouse, J.S., 2002, Data from theodolite measurements of creep rates on San Francisco Bay Region

faults, California: 19792001: U.S. Geological Survey Open-File Report 02-225, 94 p., [available at http://geopubs.wr.usgs.gov/open-file/of02-225/, last accessed June 25, 2009].

Galehouse, J.S. and Lienkaemper, J.J., 2003, Inferences drawn from two decades of alinement array

measurements of creep on faults in the San Francisco Bay region: Bulletin Seismological Society America, v. 93, p. 2415-2433.

Grove, K., and Caskey, S.J., 2005, Theodolite and total station measurements of creep rates on San

Francisco Bay Region faults: National Earthquake Hazards Reduction Program, Annual Project Summaries, v. 46, U.S. Geological Survey, [available at http://earthquake.usgs.gov/research/external/reports/03HQGR0080.pdf, last accessed June 25, 2009].

ftp://ftp.consrv.ca.gov/pub/dmg/pubs/sp/SP42.PDFhttp://earthquake.usgs.gov/research/external/reports/07HQAG0032.pdfhttp://geopubs.wr.usgs.gov/open-file/of02-225/http://earthquake.usgs.gov/research/external/reports/03HQGR0080.pdf

6

Lienkaemper, J.J., 2006, Digital database of recently active traces along the Hayward Fault, California: U.S. Geological Survey Data Series DS-177, 20 p., [available at http://pubs.usgs.gov/ds/2006/177/, last accessed June 25, 2009].

Lienkaemper, J.J., Galehouse, J.S., and Simpson, R.W., 2001, Long-term monitoring of creep rate along

the Hayward Fault and evidence for a lasting creep response to 1989 Loma Prieta earthquake: Geophysical Research Letters, v. 28, p. 2265-2268.

McFarland, F.S., Lienkaemper, J.J., Caskey, S.J., and Grove, K., 2007, Data from Theodolite

Measurements of Creep Rates on San Francisco Bay Region Faults, California: 1979-2007: U.S. Geological Survey Open-File Report 2007-1367, 4 p., [available at http://pubs.usgs.gov/of/2007/1367/, last accessed June 25, 2009].

http://pubs.usgs.gov/ds/2006/177/http://pubs.usgs.gov/of/2007/1367/

122W123W

39N

38N

37N

0 20 40kilometers

BSLP

BSNW

HCHC

BSRV

SGPR

SGWP

CV7SCVWR

CVCR

CVWC

CVSU

CVSPCVCP

GVRT

GVPR

GVCL

GVMR

HDST

HENC

HLSA

HTBRHCCC

RCSM

RCSDRCFB

RCMW

MUKI

MAMR

MSKP

MWIL

SAMV

SACRSASR

SARD

SADW

SAPR

SAAC

CASHCSAL

HCAMHRKT

HAPP

HROS

HPMD

BSLP

BSNW

HCHC

BSRV

SGPR

SGWP

CV7SCVWR

CVCR

CVWC

CVSU

CVSPCVCP

GVRT

GVPR

GVCL

GVMR

HDST

HENC

HLSA

HTBRHCCC

RCSM

RCSDRCFB

RCMW

MUKI

MAMR

MSKP

MWIL

SAMV

SACRSASR

SARD

SADW

SAPR

SAAC

CASHCSAL

HCAMHRKT

HAPP

HROS

HPMD

Alinement Arrays, late 2008

Array

Additional (see Fig. 2)Destroyed

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CALIFORNIA

Typical alinement array

target,end

target,orientation

instrumentfault trace

~100

mete

rsIS

OSES

Figure 1. Locations of alinement arrays, San Francisco Bay region. Arrays shown as triangles, additional arrays on Hayward Fault shown as diamonds. P, Point Pinole. Summary information for most arrays in table 1. All Hayward Fault arrays in table 2. Inset is idealized array described in text. Faults in red zoned as active (Bryant and Hart, 2007); other traces, preliminary mapping of Green Valley-Bartlett Springs Faults (Lienkaemper, unpubd.)

7

HSTA

HDWT

HRKT

HUNI

HPIN

HPMD H

ONOHC

AM

HSGR

HMSS

HHAN

HGIL

HAPP

HCHM

HWDL

HSEP

HPAL

HROS

H167

HFMT

HCHB

HENC

H73A

H39A

HLNC

HLSA

HTEM

HFLO

HTBR

HOLV

HCCC

HDST

122W122W

38N38N

0 4 8 12 162kilometers

D-St

Chime

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Pine S

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Rose

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73rd A

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Stadiu

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Came

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adow

Union

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167th A

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Sepul

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and Av

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km 00

km 00

km 10

km 10

km 20

km 20

km 30

km 30

km 40

km 40

km 50

km 50

km 60

km 60

km 70

km 70

Florida

Ave

Florida

Ave

Temesc

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Temesc

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Dwigh

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mer

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mer

Onond

aga

Onond

aga

PointPinole

SanPablo Bay

S a n

F r a n c i s c o

B a y

additional array

Hayward Faultarray

Figure 2. Locations of alinement arrays across Hayward Fault. Includes formerly frequent SFSU sites (triangles) and former annual sites (diamonds), see tables 1 and 2 for additional information. Yellow grid shows distance in kilometers from San Pablo Bay after Lienkaemper (2006). Faults in red zoned as active (Bryant and Hart, 2007).

8

0

100

200

1970 1975 1980 1985 1990 1995 2000 2005

y = -13411 + 6.775x R= 0.99543

CV7S Seventh Street, Hollister Calaveras Fault6.8 mm/yr since 1979

Calaveras Fault

0

100

200

300

1970 1975 1980 1985 1990 1995 2000 2005

y = -17666 + 8.9343x R= 0.9927

CVWR Hollister (Wright Road) Calaveras Fault 8.9 mm/yr since 1979

CU

MU

LATI

VE R

IGH

T-LA

TER

AL M

OVE

MEN

T (IN

MM

)

1979

C

oyot

e La

ke E

arth

quak

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1984

Mor

gan

Hill

Earth

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e

1989

L

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Prie

ta

Ear

thqu

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0

100

200

300

400

500

600

1970 1975 1980 1985 1990 1995 2000 2005

y = -33974 + 17.241x R= 0.99512

CVCR Coyote Ranch near Gilroy Calaveras Fault 17.2 mm/yr since 1968

Figure 3. Alinement-array measurements, Calaveras Fault. Straight line through the data indicates linear regression fit to data given by associated equations y (creep, mm); x (time, yr); R, correlation coefficient

9

050

100

1980 1985 1990 1995 2000 2005

y = -2008.8 + 1.0019x R= 0.46695

CVSP Shannon Park, Dublin Calaveras Fault 1.0 mm/yr since 2002

-100-50

050

100150200

1980 1985 1990 1995 2000 2005

CVCP Corey Place, San Ramon Calaveras Fault

1.8 mm/yr since 1980 [0.1 mm/yr 1980-1992; 3.5 mm/yr 1992-2001; 1.6 mm/yr 2001-2008]

050

100

1980 1985 1990 1995 2000 2005

y = -8572.4 + 4.2919x R= 0.98343

CVWC Welch Creek Road Calaveras Fault 4.4 mm/yr since 1997

050

100

1980 1985 1990 1995 2000 2005

y = -2866 + 1.4306x R= 0.75625

CVSU Sunol Calaveras Fault 1.9 mm/yr since 2002

CU

MU

LATI

VE R

IGH

T-LA

TER

AL M

OVE

MEN

T (IN

MM

)

Northern Calaveras Fault

Figure 4. Alinement-array measurements, Northern Calaveras Fault.

10

0

40

1980 1985 1990 1995 2000 2005

y = 574.68 - 0.28587x R= 0.092731

GVMR Mason Road, Fairfield Green Valley Fault -0.3 mm/yr since 2005

-20

0

20

40

60

80

100

1980 1985 1990 1995 2000 2005

y = -7241.4 + 3.6595x R= 0.99494

CASH Ashbury Drive, Concord Concord Fault 3.7 mm/yr since 1979

-200

20406080

100

1980 1985 1990 1995 2000 2005

y = -5625.9 + 2.8434x R= 0.99341

CSAL Salvio Street, Concord Concord Fault 2.8 mm/yr since 1979

-20

0

20

40

60

80

100

1980 1985 1990 1995 2000 2005

y = -7337.3 + 3.7026x R= 0.97437

GVRT Red Top Road, Fairfield Green Valley Fault 3.7 mm/yr since 1984

CU

MU

LATI

VE R

IGH

T-LA

TER

AL M

OVE

MEN

T (IN

MM

)Concord Fault

Green Valley Fault

Bartlett Springs Fault

0

40

1980 1985 1990 1995 2000 2005

y = -5653 + 2.8173x R= 0.88417

BSLP Lake Pillsbury Bartlett Springs Fault 2.8 mm/yr since 2005

Figure 5. Alinement-array measurements, Concord-Green Valley and Bartlett Springs Faults.

11

Rodgers Creek Fault

0

50

1980 1985 1990 1995 2000 2005

y = -2067.8 + 1.03x R= 0.38539

RCSM Sonoma Mountain Rd. Rodgers Creek Fault 1.0 mm/yr since 2004

0

50

1980 1985 1990 1995 2000 2005

y = -3467 + 1.7317x R= 0.91763

RCSD Solano Drive, Santa Rosa Rodgers Creek Fault 1.7 mm/yr since 2002

0

100

1980 1985 1990 1995 2000 2005

y = -12029 + 6.0408x R= 0.99337

MWIL W. Commercial Ave., Willits Maacama Fault 6.0 mm/yr since 1992

0

100

1980 1985 1990 1995 2000 2005

y = -8810 + 4.4196x R= 0.9872

MUKI Sanford Ranch Road, Ukiah Maacama Fault 4.4 mm/yr since 1993

CU

MU

LATI

VE R

IGH

T-LA

TER

AL M

OVE

MEN

T (IN

MM

)

Maacama Fault

Figure 6. Alinement-array measurements, Rodgers Creek and Maacama Faults.

12

San Andreas Fault

0

50

100

150

200

1980 1985 1990 1995 2000 2005

y = -23023 + 11.568x R= 0.99381

SAMV Mission Vineyard near San Juan Bautista San Andreas Fault 11.6 mm/yr since 1990

0

50

1980 1985 1990 1995 2000 2005

y = -2430.4 + 1.2125x R= 0.57583

SASR Searle Road San Andreas Fault 1.2 mm/yr since 2002

0

50

1980 1985 1990 1995 2000 2005

y = 337.78 - 0.16839x R= 0.33474 SGWP West Point Avenue, Princeton San Gregorio Fault (Seal Cove Fault) -0.2 mm/yr since 1979

0

50

1980 1985 1990 1995 2000 2005y = -1906.2 + 0.95989x R= 0.81614

SGPR Pescadero Rd San Gregorio Fault 1.0 mm/yr since 1982San Gregorio Fault

0

50

1980 1985 1990 1995 2000 2005

y = -188.54 + 0.094678x R= 0.13027 SACR Cannon Rd San Andreas Fault 0.1 mm/yr since 1989

0

50

1980 1985 1990 1995 2000 2005

y = -1156.2 + 0.58166x R= 0.85335 SARD Roberta Drive, Woodside San Andreas Fault 0.6 mm/yr since 1989

0

50

1980 1985 1990 1995 2000 2005

y = 524.03 - 0.26385x R= 0.77547 SADW Duhallow Way, Daly City San Andreas Fault -0.3 mm/yr since 1980

0

50

1980 1985 1990 1995 2000 2005

y = 212.11 - 0.10532x R= 0.32093 SAPR Point Reyes National Seashore Headquarters San Andreas Fault -0.1 mm/yr since 1985

0

50

1980 1985 1990 1995 2000 2005y = -901.52 + 0.45643x R= 0.86392

SAAC Alder Creek near Point Arena San Andreas Fault 0.5 mm/yr since 1989C

UM

ULA

TIVE

RIG

HT-

LATE

RAL

MO

VEM

ENT

(IN M

M)

Figure 7. Alinement-array measurements, San Andreas and San Gregorio Faults.13

1970 1980 1990 2000 2010

4.49 Co

ntra [H

CCC]

8.37 Oli

ve

17.82 S

tadium

20.84 Tem

escal

25.98 Linc

oln

27.81 39th

30.68 73rd

33.39 Enci

na [HENC

]

36.55 Chab

ot

38.28 Fairm

ont

41.11 16

7th

43.22 R

ose [H

ROS]

44.56 D-

St [HD

ST]

45.64 P

alisade

50.15 W

oodland

47.72 Se

pulchre

10.83 Tho

rs [HTBR

]

14.05 Florid

a

23.92 La S

alle [HL

SA]

50 mm

CU

MU

LATI

VE R

IGH

T-LA

TER

AL M

OVE

MEN

T (IN

MM

)

H a y w a r d F a u l t( k m 0 - 5 0 )

18.43 D

wight

7/2

0/07

M4.

2 7

/20/

07

M

4.2

Figure 8. Alinement-array measurements, Hayward Fault, sites from km 0 to 50, labeled by km distance.

14

19

89

Lo

ma

Pri

eta

Ea

rth

qu

ake

Fe

b.

19

96

cre

ep

eve

nt

55.65 A

ppian

[HAPP]

52.6

2 Chim

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59.09 G

ilbert

62.64 H

ancock

63.10 U

nion

65.29 P

ine

67.02 P

rune-Gri

mmer

68.45

Missio

n

62.25 R

ockett

[HRK

T]

66.29 C

amellia

[HCAM

]

66.67 P

arkmead

ow [H

PMD]

CU

MU

LATI

VE R

IGH

T-LA

TER

AL M

OVE

MEN

T (IN

MM

)

50 mm

1 9 7 0 1 9 8 0 1 9 9 0 2 0 0 0 2 0 1 0

H a y w a r d F a u l t( k m 5 0 - 7 0 )

Figure 9. Alinement-array measurements, Hayward Fault, sites from km 50 to 70.

15

Site

Co

deFa

ult

Site

Nam

eLo

ngitu

de

(WGS

84)

Latit

ude

(WGS

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Leng

th

(m)

Line

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n av

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eep

rate

(m

m/yr

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(m

m/

yr)

Ave.*

cr

eep

rate

(m

m/yr

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2

BSL

PB

artle

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rings

Lake

Pill

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39.4

4560

102.

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2.1

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BSN

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New

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ings

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8014

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Rou

nd V

alle

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23.2

2755

39.7

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182

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Con

cord

Ash

bury

Driv

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22.0

3524

37.9

7189

133.

206

3.7

0.03

3.6

27.8

CSA

LC

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57.1

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129

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5289

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16

Distance from Pt. Pinole (km)

Site Code Site Name

Longitude (WGS84)

Latitude (WGS84)

Length (m)

Linear regression

average creep rate

(mm/yr)

(mm/

yr)

Average* creep rate

(mm/yr) yr Note4.49 HCCC Contra Costa College -122.33902 37.96918 146.04 5.2 0.06 4.9 28.98.37 HOLV Olive Drive -122.30959 37.94252 149.07 5.2 0.08 5.2 19.2

10.83 HTBR Thors Bay Road -122.29294 37.92449 119.54 3.4 0.09 4.0 19.114.05 HFLO Florida Avenue -122.27340 37.89980 126.11 2.7 0.09 2.6 11.3 117.82 HSTA Memorial Stadium -122.25061 37.87066 165.46 4.7 0.04 4.8 42.018.43 HDWT Dwight Way -122.24107 37.86447 131.59 5.1 0.32 4.9 11.220.84 HTEM Temescal -122.23137 37.84853 153.92 4.0 0.10 4.1 34.623.92 HLSA LaSalle Ave -122.21005 37.82638 182.84 3.9 0.05 4.5 15.725.98 HLNC Lincoln -122.19863 37.80999 110.41 3.5 0.09 3.7 38.527.81 H39A 39th -122.18931 37.79504 137.81 4.0 0.13 4.1 34.630.68 H73A 73rd -122.16977 37.77426 89.81 3.2 0.11 3.4 15.4 133.39 HENC Encina Way -122.15148 37.75453 123.80 2.5 0.09 2.9 19.236.55 HCHB Chabot Park -122.12993 37.73184 230.44 4.0 0.19 4.2 15.538.28 HFMT Fairmont -122.12131 37.71749 166.60 3.5 0.17 3.8 11.2 141.11 H167 167th -122.10578 37.69495 90.18 4.7 0.11 5.1 16.243.22 HROS Rose Street -122.09121 37.67983 153.77 4.7 0.04 4.4 28.444.56 HDST D Street -122.08162 37.67021 112.32 4.5 0.02 4.5 28.445.64 HPAL Palisade -122.07397 37.66270 174.22 4.5 0.20 4.5 31.847.72 HSEP Sepulchre -122.05902 37.64798 107.14 5.5 0.12 5.7 14.350.15 HWDL Woodland -122.04140 37.63097 66.58 4.3 0.10 4.5 38.8 152.60 HCHM Chimes -122.02325 37.61422 118.65 6.2 0.19 6.2 14.355.65 HAPP Appian Way -122.00193 37.59240 124.89 5.7 0.04 5.5 29.159.09 HGIL Gilbert -121.98094 37.56645 89.26 5.2 0.13 5.5 25.1 262.25 HRKT Rockett Drive -121.96187 37.54210 103.23 5.3 0.06 5.5 29.162.64 HHAN Hancock -121.95914 37.53942 88.51 5.8 0.18 5.8 26.8 263.10 HUNI Union -121.95584 37.53614 168.10 7.0 0.11 7.1 15.8 265.29 HPIN Pine -121.94181 37.51973 97.65 6.2 0.20 6.1 19.6 266.29 HCAM Camellia Drive -121.93528 37.51235 88.35 4.4 0.10 4.1 18.766.67 HPMD Parkmeadow Drive -121.93262 37.50960 156.91 6.1 0.09 5.9 16.667.02 HSGR S. Grimmer -121.93046 37.50720 129.54 5.9 0.26 6.5 26.4 267.21 HONO Onondaga -121.92894 37.50516 72.88 2.7 0.22 2.9 26.5 2,368.45 HMSS Mission -121.92182 37.49629 168.94 5.0 0.21 4.5 15.7 2

1) Array may miss significant fault traces2) Slip rate includes considerable slow-down following 1989 Loma Prieta Earthquake3) Array misses a major creeping fault trace*Average = total slip/total timeNumber of years observed

Table 2. Average Rates of Right-Lateral Movement, Hayward Fault

17

Title pagebacks title page

IntroductionMethodsDataAcknowledgmentsReferences citedFiguresFigure 1.Figure 2.Figure 3.Figure 4.Figure 5.Figure 6.Figure 7.Figure 8.Figure 9.

TablesTable 1.Table 2.