XPK1
Parkfield Creepmeter

As of December 1998 maintenance check, observed
that pipe connect both vaults (instrument and anchor
vaults) is touching the invar wire.

Some creep events are "triggered" by rainfall!!


Wire broke during 2004 Parkfield EQ (Sept 28)
Zero has been lost.

Data after Parkfield earthquake is labeled as XPK2


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)