“…That such planes do, indeed, exist is suggested by the close agreement between the directions of the maximum horizontal principal stress in this well [ Moos et al ., 1988; Plumb , 1988] and the P‐axis from a composite focal mechanism for a shallow (1.3–1.9 km deep) swarm of reverse‐faulting earthquakes that occurred within 0.5 km of the well [ Mrotek et al ., 1988; Woodward‐Clyde Consultants , 1988]. High‐stress normal faulting is suggested by recent in‐situ stress measurements in four different wells at depths of 0.3–1.7 km beneath Yucca Mountain, Nevada [ Stock et al ., 1985, 1986; Stock and Healy , 1988a] and by in‐situ stress measurements and borehole breakout analyses at depths of 3–4.5 km beneath Fenton Hill, New Mexico [ Barton et al ., 1988; see also earthquake fault‐plane determinations by Fehler , 1989].…”