AUTOMATIC TIME-DOMAIN CALCULATION OF SOURCE PARAMETERS FOR THE ANALYSIS OF INDUCED SEISMICITY

A time-domain methodology for the automatic (on-line) calculation of s ource parameters is introduced. The method is based on applying Parsev al's theorem to the spectral equations proposed by Andrews (1986). The appropriateness of the technique for the analysis of induced seismici ty was tested by comparing on-line values of seismic moment, seismic e nergy, and static stress drop with those obtained in the frequency dom ain (off-line) for an aftershock sequence of events recorded undergrou nd at Creighton mine, Ontario. Our analysis shows that the calculated online and off-line source parameters are in good agreement, with an a verage slope offset of 4% from the 1:1 line, suggesting that the propo sed method is reliable. Additionally, by applying empirical on-line at tenuation corrections (coda Q), similar results are obtained to those calculated using off-line corrections (spectral decay), improving the average slope offset to 1%.