So in these series of scans, the Silver Samurai is blasted by Storm's lightning which sets off some explosives that destroy the building he's in. Despite being at the epicenter of the blast, the Samurai has no injuries when he comes out.
The lightning is unquantifiable but it should be noted that Storm's control over her powers was messed up and she was blasting him with enough lightning to kill according to her.
Let's calculate the explosion.
Storm is 92.8 pixels and 1.8034 meters tall.
The head of the pier pillar (the thing at the bottom of the panel that looks like a nail) is 26 pixels and 0.5 meters tall.
On the next panel the head is 21 pixels tall.
The diameter of the explosion is 743.847430593 pixels or 17.8969067479 meters.
Divide by 2 and convert to kilometers.
Y = ((x/0.28)^3)/1000
x = 0.00894845337395 kilometers
Y = 0.03 tons of TNT
It should be noted the Samurai scales to basically every Street Leveler in Marvel, as he started off as a Daredevil villain and became one of Wolverine's most recurring enemies.
9-A Small Building Level +