By time-compressing the output of a seismometer, it is possible to present seismographic data in an auditory display. Preliminary data suggest that the seismic sounds due to natural earthquakes may be distinguishable from those due to underground explosions. Some functions are presented to indicate how probability of detection varies with amount of initial training and distance of the seismometer from the explosion source. Other applications of auditory displays in the analysis of seismological data are suggested.