Since the air density is known, the Sedov-Taylor solution has one single parameter (the initial blast energy \(E_0\) ) which we determined fitting the observed data obtained from the recently declassified video posted on youtube. The best fit is obtained for \(E_0=4.3\) kilotons, which is the right order of magnitude when compared to the energy declared by LNLL for this experiment (\(7\) kilotons). Python code used to generate this figure.