Clark crashes into a mountain on Ellesmere island destroying the top of it, Feat happens here.
The British Empire Range is a mountain range on Ellesmere Island and is the most likely place superman crashed. This is kinda a lowball since I'm missing a decent portion that got destroyed but it still should work out.
As a lowball we'll use Highpointer peak which has a elevation of 1585m and as a highball we'll use Barbeau Peak which has a elevation of 2616m.
Low-End[]
1585/292 * 84 = 455.95890411m
1585/292 * 25 = 135.702054795m
(Pi)*(455.95890411^2)*(135.702054795/3) = 29543806.0843m^3
29543806.0843m^3 * 8 J/cc = 2.36350449 × 1014 joules or 56.4891130497131897 Kilotons of TNT (Town level+)
High-End[]
2616/292 * 84 = 752.547945205m
2616/292 * 25 = 223.97260274m
(Pi)*(752.547945205^2)*(223.97260274/3) = 132828682.008m^3
132828682.008m^3 * 8 J/cc = 1.06262946 × 1015 joules or 253.97453632887186359 Kilotons of TNT (Large Town level)