WKR1
Work Ranch creepmeter

Has "CalTech" style electronics

Note that archive have data only from 1977 forward

2004 Parkfield (Sept 28)  'pegged' the creepmeter;
loosen wire at creepmeter and let 29 mm of wire slide
to get a micrometer measurement of 22.4mm

For the field visits on Nov 15 2004 and Jan 3, 2005, noted
that the voltage to the transducer (a potentiometer) was
110 mv; it should be 100mv but was not adjusted. Prior
field visits had measured voltages at approximately 100 mv (+/-
1 mv);  Consequently, I adjusted the scale factor by 0.909
for data between Nov 1, 2004 and Feb 1 2005; This better reconciled
the telemetried data and the micrometer measurements. Hopefully,
the next field visit will include adjusting the voltage to the
transducer.  

November 2006; DCP was swapped out for new one; electronics
remain the same as output is 0 to 1 volt. Scale factor change of
ratio 1000/409.6

Scale factor is now 271 counts(mv) per mm 
fault slip (creep).

N 201403090000 Potentiometer reset (AS)
N 201403090350 Ditto 
N 201403080540 Ditto 
N 201403080750 Ditto
N 201403080810 Ditto
N 201403081030 Ditto
N 201406151945 ditto (JOL)
N 201406192340 Potentiometer reset (AS)
S N 201411040720 Potentiometer reset (AS)
N 201411041220 Potentiometer reset (JOL)
S N 201411051140 Potentiometer reset (AS)
N 201411051210 Potentiometer reset (AS)
S N 201411051250 Potentiometer reset (AS)
N 2014j3100420 continued Potentiometer reset (JOL)
N 201501290400 Potentiometer reset (AS)
N 201501291930 Ditto
S N 201505131920 Wire reset (AS)
S N 201505131930 Wire reset (AS)
N 201505131940 Ditto
N 201602181630 Potentiometer reset (JOL)
N 201602190445 ditto
N 201606142040 Potentiometer reset (AS)
N 201606161930 Ditto cont'd (AS)
N 2016j3390140 Potentiometer reset (JOL)
N 2016j3400210   ditto -- cont'd
S N 201701190220 Potentimeter reset (AS)	
S N 201701190230 Ditto
N 2017j0190240 Potentiomenter reset (JOL)
S N 201701190250 Ditto (AS)
S N 201701190300 Ditto 
S N 201701190320 Ditto 
S N 201701190330 Ditto
S N 2017j0190340 Ditto
S N 2017j0191130 Ditto
N 2018j0810520 Potentiometer reset (JOL)
N 2018j0810730 ditto
N 2018j1161830 Potentiometer reset (TLE)
N 201903051855  ditto (JOL)
N 201903071855  ditto (JOL)
N 2019j2192240  ""
N 2019j2211930  ""
N 2019j3381600 Potentiometer reset (JOL)
N 2020j0400320  ditto (JOL)
N 2020j0410840 ditto
N 2020j2061930 Potentiometer reset (TLE)
N 2020j2072320 ditto 
N 2020j3250610  Potentiometer resest (JOL)
N 2020j3271030 ditto
N 2021j0741200 potentiometer reset (JOL)
N 2021j0750530  ditto 
N 2021j1672100 field reset/rezero
N 2021j2081810   Potentiometer reset (JOL)
N 2021j2092040  ditto
N 2021j3031150 ditto (JOL)
N 2021j3051055 ditto (JOL)
N 2022j0062330   ""
N 2022j0071020  ""
N 2022j3610820  ""
N 2022j3612020 ""
N 2024j0041430 ""
N 2024j0050640  ""

Many of the above offsets are due to a dead portion of the potentiometer; there will be
a pair of offset separated by about 1-day.

For more information, please consult:
Open-File Report 2024-1011, “Summary of Creepmeter Data from 1980 to 2020—Measurements Spanning the Hayward, Calaveras, and San Andreas Faults in Northern and Central California” https://pubs.usgs.gov/publication/ofr20241011

and
Open File Report 89–650, "Catalog of creepmeter measurements in California from 1966 through 1988" https://pubs.usgs.gov/publication/ofr89650

Many people have contributed to this project including:
Roger Bilham
Robert Burford
Sandy Schulz
Andy Snyder
Kate Breckinridge
Todd Erickson
Rich Liechti
Vince Keller
John Langbein

For questions, contact John Langbein (langbein@usgs.gov)