Exactly. That’s why this geologist is dead wrong in thinking they are building primitive fat boy type nukes.
They would be concentrating their efforts on making modern miniaturized nukes similar to ours, and NOT wasting their limited plutonium supply. A 4KT blast could mean they had a very successful test, after following the directions at ‘howstuffworks.com’ LoL!
Their goal isnt a miniature deliverable. They just need something that goes “boom” down in a hole. That achieves Kim’s goal of squeezing money out of the USA. We got a weak naive president in January. He figured out how to play his guy in a nanosecond.
The proper way to measure the yield of a North Korean is not in Kilotons,,,it’s more properly measured in billion’s of dollars bluffed out of the USA!!
For all we know, they were testing a nuclear trigger. Our nukes have triggers that put out as much power as the nagasaki bomb.