chp1

Samping interval decreased from 10 minutes to 1 minute in late 2019;
The 10-minute data file reflects this change in sampling rate.

Possible Offsets:
N 2009j2421430 site visit?
N 2013j0472100 site visit
N 201407272000 site visit
N 2015j0342335 bad ground?? offset seen in temperature, too
N 2015j0370800 ground going bad
N 2015j0380135 bad ground?? offset seen in temperature, too
N 2015j1071930 Bad ground fixed with a site visit
N 202001022100 site visit to install new rupture meter
N 2023j0290816 unexplained offset in lvdt only


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