Tsar Bomba was originally designed to be 100MT(I think) but then they reduced it to 50-57MT (I think) I think another reason for reduction was the level of fallout created.
I don’t think the theory about four well placed 50MT is correct. Super volcanoes, say Yellowstone caldera, are believed to be around 200 or so Megatons.
>>>Tsar Bomba was originally designed to be 100MT(I think) but then they reduced it to 50-57MT (I think) I think another reason for reduction was the level of fallout created.<<<
An idea was actually to make a delivering aircraft escape without melting.