S-P Interval To Distance Calculator
Epicentral distance from the S-minus-P arrival-time interval: d = dt * (vP * vS) / (vP - vS) for a common straight-ray path.
Description
Epicentral distance from the S-minus-P arrival-time interval: d = dt * (vP * vS) / (vP - vS) for a common straight-ray path.