A ground motion prediction methodology, based on more than ten years experience at Nevada Test Site and incorporating both empirical and theoretical analyses has been developed for Plowshare detonations. Empirical relationships are based on analyses of ∼4000 seismograms representing a range in yield of 1 to <5000 kt, in epicentral distance of 0.3 to about 350 miles, and in peak surface particle vector acceleration of 10−5 to 1 g. On a theoretical basis, mathematical models have been developed which give quantitative predictions of the effects of critical parameters of the source, transmission path, and local recording site geology on the ground motion. This methodology has been validated for two Plowshare gas stimulation detonations, Gasbuggy and Rulison, and is applicable for Rio Blanco and Wagon Wheel.