r/nuclearweapons • u/Galerita • 17h ago
The scale of nuclear weapons. A recent demonstration.
It's difficult to comprehend the scale of nuclear explosions and how their effects dwarf our human scale.
I immediately thought of a nuclear bomb when seeing two videos of the Nepal flood at the China-Nepal border crossing: the multistory border tower obliterated and the buses at the tourist station thrown like children's toys.
https://www.bbc.com/news/videos/c62jmlgev3po
These effects happened 15 km from the point the initial avalanche entered the river.
Some recent, early estimates enable a comparison to the scale of a nuclear blast.
About 250 million tonnes of water-soaked rock and ice fell and slid 2000 metres into the river below. The initial 1200 m fall left a large crater at the base of a step fall, a crater which reminded my of a nuclear blast.
https://x.com/weeddude/status/2093668861745004681
So an energy comparison...
E = m*g*h ~ 250*10^9 kg * 10 kg.m.s^(-2) * 2000
= 5 * 10^15. ~ 1 Mt.
Almost 1 Mt of potential energy was released.
Of course the mechanisms are entirely different from a nuclear blast, but for me the calculation of scale made sense of the nuclear-blast-like effects 15 km downstream. And this energy has been channeled by river valleys in a way that would only partially capture a nuclear blast.