Of the parameters appearing in Eq.(39), we have estimates for dM/dt and T L based on the observation, and T by formula (37), while n eq [T L ] and n eq [T ] can be estimated, for example, by Goff's formula . As for E 1 , however, we only know its range given by Formula (38). Therefore we choose, as a tentative example, the lower limit value, -4.45 × 10 4 J mol -1 . Thus estimates were available for all the parameters in the right side of Eq.(39), and the numerical evaluation leads to A 1 ∼ 3.5 × 10 -7 m s -1 .