def _compute_pga_rock(self, C_PGA, mag, rjb):
        """
        Returns the PGA (g) on rock, as defined in equation 15
        """
        return np.exp(self._compute_linear_magnitude_term(C_PGA, mag) +
                      self._compute_simple_distance_term(C_PGA, rjb))
def _compute_pga_rock ( self , C_PGA , mag , rjb ) : return np . exp ( self . _compute_linear_magnitude_term ( C_PGA , mag ) + self . _compute_simple_distance_term ( C_PGA , rjb ) )
Returns the PGA (g) on rock, as defined in equation 15