On application of mean frequency for seismic differentiation

A simple discriminant is introduced for differentiation of the underground nuclear explosion and natural earthquake. Here instead of magnitude which is related to the energy consideration is given to the mean frequency which is related to zero crossings and carries sufficient information concerning the energy. It is shown that this discriminant can be used in the absence of the facilities such as digitizer and computer. Finally, application of the proposed procedure is demonstrated using data from some underground and atmospheric explosions. (author). 12 refs, 1 fig., 1 tab