Thermal radiation goes as yield^{1/2} for the reason you’ve suggested but pressure goes as yield^{1/3} because the region of overpressure expands and therefore maximum pressure is 1/volume. I’m not sure how this interacts with the curvature of the Earth but would generically expect this to make things more benign at the antipode, not less.
I thought we were talking about a shockwave, so ultimately a pressure front? That’s the part that travels several times around the world. I mean obviously with plenty of volumetric loss/dispersion on the road.
Thermal radiation goes as yield^{1/2} for the reason you’ve suggested but pressure goes as yield^{1/3} because the region of overpressure expands and therefore maximum pressure is 1/volume. I’m not sure how this interacts with the curvature of the Earth but would generically expect this to make things more benign at the antipode, not less.
I thought we were talking about a shockwave, so ultimately a pressure front? That’s the part that travels several times around the world. I mean obviously with plenty of volumetric loss/dispersion on the road.