https://en.wikipedia.org/wiki/Underground_nuclear_weapons_testing https://en.wikipedia.org/wiki/Underground_nuclear_weapons_te... seems it usually happened at

https://en.wikipedia.org/wiki/Underground_nuclear_weapons_testing https://en.wikipedia.org/wiki/Underground_nuclear_weapons_te... seems it usually happened at lesser depths, and for ones deep enough to contain debris, the main effects were geological, from the actual explosion? not what i expected tbh