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Healy & Zoback 1988
Healy, J.H. and Zoback, M.D. (1988). Hydraulic fracturing in situ stress measurements to 2.1 km depth at Cajon Pass, California. Geophysical Research Letters 15: doi: 10.1029/88GL00582. issn: 0094-8276.

Stress measurements to 2.1 km reveal stress changes with depth that cannot be explained by an elastic response to uniform crustal strain. The data at about 1 km depth suggest that the stress is limited by the frictional strength of rock and is perturbed at greater depths by faults which intersect the borehole. The stress data indicate that there is little or no right--lateral shear stress acting on planes parallel to the San Andreas Fault.

BACKGROUND DATA FILES

Abstract

Keywords
Exploration Geophysics, Downhole methods, Information Related to Geographic Region, North America
Journal
Geophysical Research Letters
http://www.agu.org/journals/gl/
Publisher
American Geophysical Union
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