# Is it possible to calculate 100,000 MT nuclear blast radius?

## Main Question or Discussion Point

Really, what I'm wondering is if the blast radius is a constant given an increase in output. I assume it is not. So I'm really at a loss as to how to calculate such a massive value.

The scenario is the explosion occurs at sea level on a flat desert plane.

Help?

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mfb
Mentor
What do you define as "blast radius"?
In addition, all three will depend on the height of the explosion.

Last edited:
What do you define as "blast radius"?
In addition, all three will depend on the height of the explosion.
I'm thinking of the radius within which there is "total destruction" of any objects that are not very heavily reinforced.

mfb
Mentor
Nuclear explosion simulator
Does not allow to detonate nukes above 2 MT, but I did some scaling guesswork:

2 MT: 821 km^2
1 MT: 417 km^2
0,2 MT: 88 km^2
0,02 MT: 10 km^2
0,002 MT: 1,3 km^2

Looks like a factor of ~9 for the area for a factor of 10 in weapon yield. If that does not change, I would expect an area of 25*10^6 km^2 or a radius of 2800 km for an explosion of 10^5 MT. However, this would need a nearly flat explosion, which is a bit unrealistic for such a high yield. Multiple bombs at different places could give that effect, of course.

Another tool, here for the shock wave:
5 psi overpressure: "Complete destruction of ordinary houses, and moderate to severe damage to reinforced concrete structures, will occur within this ring." (does not take heat into account)

20MT: 12.28 km
2MT: 5.7 km (102km^2)
0,2MT: 2.64 km
0,02MT: 1.23 km
That corresponds to a factor of 2.15 in radius or 4.64 in area for a factor of 10 in yield. As ##10^{1/3}=2.154## and the shock wave is spherical, that looks reasonable.
Scaled to 10^5 MT: