TIL a series of US explosion tests by was performed in 1965 near Hawaii using 450t of explosives. 92,022 blocks of TNT were stacked in domes to simulate the shock effects of nuclear blasts without the radiation.

https://en.wikipedia.org/wiki/Operation_Sailor_Hat

https://www.reddit.com/r/todayilearned/comments/153v0yc/til_a_series_of_us_explosion_tests_by_was/