xshr1

The 1 day sampled data represent a merger between the older instrument, installed
in 1971, and its replacement, installed ~1985. That instrument was on
telemetry until 1997; from then until 2017, only manual, micrometer measurements
were made. The instrument was destroyed in 2017.  In 2020, a replacement
instrument was installed and that is on telemetry.  The manual and 1-day
sampled data files are for the data up to 2017; the 10-min file is for the
data after 2020.  The sensor is a Hall affect device used as a rotary. After
each full revolution, the output voltage is reset; this usually corresponds
to 10-12 mm displacement

Known Offsets:
N 2020j3010427
N 2021j3620513 sensor wrap
N 2022j1132141 sensor wrap
N 2022j2342210  sensor wrap
N 202403200000 site rebuilt




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