Deepwell monitoring of strain-sensitive parameters over the greater Southern California uplift

Thomas L. Henyey; Ta-liang Teng; Douglas E. Hammond; C.G. Sammis

doi:10.3133/ofr81881

Deepwell monitoring of strain-sensitive parameters over the greater Southern California uplift

Open-File Report 81-881

By: Thomas L. Henyey, Ta-liang Teng, Douglas E. Hammond, and C.G. Sammis

https://doi.org/10.3133/ofr81881

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Abstract

Several wells and springs near active faults in southern California have been monitored for the concentration of Rn, Na⁺ , K⁺ , Mg⁺² , and Cl^- for periods of up to 24 months, in an effort to see if any of these constituents show variations which may be related to seismic activity. Radon might reflect either a change in the rock surface area to pore volume ratio or a change in groundwater flow characteristics. The chemistry may change with a change in the flow characteristics. Only a few of these sites have shown significant fluctuations in either radon or chemistry. Data from cold springs are consistent with a model in which ionic constituents are controlled by reactions in the soil zone and radon concentrations are controlled by flow rates in the aquifer.

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Additional publication details
Publication type	Report
Publication Subtype	USGS Numbered Series
Title	Deepwell monitoring of strain-sensitive parameters over the greater Southern California uplift
Series title	Open-File Report
Series number	81-881
DOI	10.3133/ofr81881
Year Published	1981
Language	English
Publisher	U.S. Geological Survey
Description	55 p.
Country	United States
State	California