code: def _compute_distance_term(self, C, mag, dists):
          
          return ((C['theta2'] + C['theta14'] + C['theta3'] *
                  (mag - 7.8)) * np.log(dists.rhypo + self.CONSTS['c4'] *
                  np.exp((mag - 6.) * self.CONSTS['theta9'])) +
                  (C['theta6'] * dists.rhypo)) + C["theta10"]
docs: Computes the distance scaling term, as contained within equation (1b)