OK so...
The blue line (750 meters) is about 1115px in length. The green line (Diameter of explosion) is 2553px in length.
Diameter: 750*(2553/1115)= 1717.264574 meters diameter. 858.632287 meters radius.
Now, putting this in our trusty nuke calculator
here, to attain a near-total fatality radius of that size, you'll need around 0.0298 megatons of TNT or 29.8 kilotons of TNT. No need to halve the result as this is a real nuke.
Now, inverse-square law ft. Cross-Sectional Area
I= P/A where P is the yield in tons of TNT and A is the area of the diameter covered by the explosion with the radius being in meters (Radius is the distance the person is away from the explosion)
Now, we know that Arasaka Tower is 494 meters tall with 150 storeys. 494/150 storeys gives us a 3.29333 meter height per storey, and Smasher and co. were on storey number 120, so 150-120= 30 storeys away from epicenter and 30*3.29333= 98.8 meters AKA they were 98.8 meters away from the epicenter
I= P / (4π((R)^2)) where P is, well, the yield in tons of TNT and R is the radius in meters AKA your distance from the epicenter of the big boom
I= (29800) / (4π((98.8)^2))= 0.24293635488 tons of TNT (9-A+)
Most peds seem to be more or less the same height as Johnny Silverhand, who was portrayed by Keanu Big Chungus Reeves, who according to a google search, is
186 cm tall and 84 kg heavy. Real big boi. So we can also assume that Morgan Blackhand, who actually takes the explosion instead of Johnny, is of the same proportions.
Cross-sectional area is usually less than half that of total surface area but can vary wildly depending on what your body type is so we'll just take half of Johnny's surface area as our cross-sectional area.
Using this trusty
medcalc surface area calculator, we get 2.087 m^2. Halve that for cross-sectional area and it is 1.0435 m^2, so that is Blackhand's cross-sectional area.
Final yield: 0.24293635488*1.0435= 0.25350408631 tons of TNT (Baseline 8-C).
OK, time for Smasher.
News sources say he is 9ft, and let's just assume him being 300 kg due to the metal alone. 9ft is 274.32 cm.
Putting the values in the same calculator, we get a whopping 4.752 m^2 surface area for Smasher. Halve that and cross-sectional area is 2.376 m^2.
Smasher takes: 0.24293635488*2.376= 0.57721677919 tons of TNT (8-C)
Jesus.
