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Estimation of Range to Seismic Event Origin Using S-P Times <br /> slower <br /> S wave <br /> 1 at arriving <br /> P � <br /> wave <br /> 1y <br /> S-P time <br /> r... ,1 <br /> In i iy <br /> Imes <br /> 1 I I r <br /> k .. N1Lna <br /> crie irwti <br /> / .1 <br /> IIL✓ ,, <br /> i <br /> line of constant S-P time <br /> By measuring the ditTerence in the arrival times of the faster P wave and the slower S <br /> wave, one can estimate the distance the waves traveled before reaching the seismometer. <br /> To convert an observed S-P time to a distance or range from the King Mine station, the <br /> seismic velocity structure in the region must be known. Distance= (S-P time)*factor <br /> where the factor is a function of the P-wave and S-wave velocities along the wave path. <br />