Pressure data (not scaled to units of pressure) are also provided. Strain data adjusted for the Earth Tide and atmospheric pressure changes. Offset due to valve resets have been removed.ĭata are provided in two modes 1) Cleaned strain data and 2) Clean Outliers due to telemetry problems, instrument visits,Īnd etc have been removed. (units of 0.001 part per million) as a function of time for instruments The data listed below are measures of changes in volumetric strain More information can be found in the USGS Open File Report:Ĭreepmeter measurements in California from 1966 through 1988įor information on 5 sites along the Hayward Fault (cpp, ctm, coz, Represent human generated and cleaned data, these files are only updated
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These data have been hand-edited to remove periods of bad dataĪnd, where possible, compared with manual measurements. For each site, the available dataĪre listed.
For other creepmeters, the measurements are made manually.īelow is a list of creepmeters, from North to South, located on the SanĪndreas, Hayward, and Calaveras Faults. InĪddition, these measurements are periodically measured manually forĬomparison. Minutes and sent via satellite telemetry to Menlo Park for analysis. Measures the change in length of the wire (or the change in distanceįor many of the creepmeters, the measurements are made once every 10 There is an invar wire oriented roughly a 30 degreeĪngle from the local trace of the fault. The main fault trace liesīetween the two piers. Creepmeters consist of two piers separated byĪbout 30 meters and connected by an invar wire. The data listed below are measures of surface fault slip (scaled in mm)Īs measured by creepmeters.
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