[en] The stress and strain imposed on Yucca Mountain by an underground nuclear explosion (UNE) of 700 kt at a distance of 22.8 km is estimated. Surface motion measurements at Yucca Mountain from a UNE on Pahute Mesa were scaled to 700 kt assumed to be at the southern part of the Buckboard Area. Peak values of surface ground motion were reduced for repository depth according to experience from a recent measurement at Yucca Mountain. The P-wave was found to increase vertical stress only 8% above the lithostatic stress and to increase the horizontal stress by an additional 24%. Stresses produced by the Rayleigh wave are smaller than those produced by the P-wave. The P-wave produced a strain of 1.25 x 10^-5. The Rayleigh wave produced a horizontal strain of 9.5 x 10^-6, and a vertical strain of 5 x 10^-6. Because the wavelengths of the P-wave and the Rayleigh wave are so large with respect to a tunnel diameter, no dynamic amplification factors need be taken into account. Although the strains are small, they are much greater than those caused by earth tides or the east-west extension of the tectonic province in which Yucca Mountain is located. 11 references, 2 figures, 3 tables