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SDR 5 in Megatons?

CadetNewb

CadetNewb

Well-Known Member
I'm beginning to get curious - how many Megatons of TNT would an explosion or impact need to be rated at in order to register at SDR 5? Thinking about it, this would actually be a much more accurate measure of how powerful our weapons are, especially considering the mental imagery we have with the Megaton. It's still not as accurate as something like using petajoules, but it's something. The biggest nuke humanity's ever set off in real life had a fireball with a diameter of about 8 kilometers, or 5 miles, and that was only somewhere between 50 and 58 Megatons of TNT.

What does it take in Megatons of TNT to be rated as SDR 5?
 
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