ctm1

Samping interval decreased from 10 minutes to 1 minute in late 2019;
The 10-minute data file reflects this change in sampling rate.
LVDT was changed on day of year 161 in 2020.

Offsets in time-series
N 2009j1382220  site visit?
N 2016j2291800  rezero lvdt
N 202006090000 replaced LVDT  
N 202006122000 install new carbon fibre rod
M 2024j1981750  new lvdt --- unfortuneately, not measurements were taken to cover the gap in data -- baseline is lost

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