Details of Processed Creep Data California 1995-2010 (This page undergoing revisions Feb 2010
click here for simple access to Hayward Fault data

Click on thesite of interest on the map map or table to view plots of data from each site, or to obtain access to ascii listings of numerialc data. Click on the site description in the table below to learn about how each creep-meter is attached.

University of Colorado Creep-meter Locations & mean Creep Rates , California

Data

description

mm/yr inst

 mm/yr pin Fault

lat N

long W

transducer

length m

 span

obliquity

*
cpp1 Pinole 4.9±0.3 5.1±0.1 H 37°59.35 122 21.27 100 mm 30 1994-09 30 I
coPP Pinole 4.9±0.3 (c1968) H 37°59.35 122 21.27 32mm 30 1994-09 30 Q
ctm Temescal 3.30±0.3 3.8±0.1 H 37°50.63 122°13.63 100 mm 30 1996-09 30 I
coTM Temescal 3.30±0.3 (c.1974) H 37°50.63 122°13.63 100 mm 30 1996-09 30 I
coz1 Oakland 2.6-3.5 3.6±3 H 37°45.16 122°09.0 50 mm 30 1996-09 30 Q
coZO Oakland 2.6-3.5 c.1977) H 37°45.16 122°09.0 50 mm 30 1996-09 30 C
chp1 Hayward 4.7 3.7±0.6 H 37°39.76 122°4.44 25 mm 10 1994-09 45 I
coHP Hayward 4.2-4.7 (c.1977) H 37°39.76 122°4.44 32 mm 10 1994-09 45 Q
cfw1 Fremont 6.6±0.2 8.5 H 37°31.94 121°57.14 100 mm 33 1994-09 30 Q
coFW Fremont 6.6±0.2 (c1900) H 37°31.94 121°57.14 32 mm 30 1994-09 30 I
coNR Nyland 10.4±0.5 7 (c 1967) SA 36.855 121.546 32 mm 8 2004-09 45 I
coWR Parkfield >50**   SA 35.8587 120.3924 10 cm 24 2004-06 30 Q/I
coWT Parkfield <3   SA 35.7580 120.3003 32 mm 6 2004-06 30 I
co46 Parkfield <3   SA 35.7249 120.2818 32 mm 14 2004-09 30 I
coFE Ferrum 3±1 real-time data SA 33.45725 115.85386 J2225 10 2004-09 30 C
coSC Salt Creek 1±1 real-time data SA 33.4485 115.8437 J2781 10 2004-09 >50 SS
coDU Durmid Hill 1±1   SA 33.4147 115.7985 J2959 8 2004-09 30 C
coSH Superstition 1.3** real-time data SH 32.9301 115.7009 J2223 6 2004-09 30 I

Notes: * I=Invar, Q=Glass fiber, SS=stainless steel, C=graphite **Afterslip decay interupted by large slip events

Site descriptions: Two independent but parallel creepmeters operate at many of the Hayward fault sites- a GOES telemetered system and a local data logger system

Fault: H=Hayward Fault, SA=San Andreas Fault, SH=Superstition Hills, San Jacinto System

mm/yr Creep rates measured by creep-meters (in red) usually underestimate actual creep-rates by 10-30% depending on the width of the fault zone. The column "mm/yr pin" indicates the long term creep rate measured geodetically or from offset structures (e.g. Lienkaemper et al., 2001; Galehouse, 2002).