Abstract

A method is presented enabling one to estimate the volume of seismic events with all possible magnitudes and focal depths. The underlying observational data are either the travel times of body waves, or the equivalent magnitude calibration curves for body waves, if the absorption of body waves is neglected.

The method is applied to the newest P-wave travel times. The distance from the focus to a point at which a given critical strain existed during the event is computed. The volume within strains larger than the critical prevailed during the event is obtained as a function of magnitude and focal depth. The volume so found is in agreement with a previous determination of the earthquake volume as a function of magnitude.

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