Proceedings of Workshop XVII; workshop on hydraulic fracturing stress measurements (volumes 1 and 2)

In-situ stress project, Technical Report Number 8; Calibration and accuracy of electronic gauges used in the hydrofracturing experiment, Cajon Pass, California

“…The overall purpose of the project is to measure the tectonic stress field at depth along the San Andreas fault using the hydraulic fracturing technique (Hubbard and Willis, 1957;Zoback and Haimson, 1983). This requires monitoring transient fluid flow and pressure during open-hole pump tests.…”