Pestcontrol
In Cryo Sleep
Dug the news some more, Russia estimates 5-15kt, South Korea says ~0.55kt, definitely less than 1kt, France also says <1kt. North Korean state news (for what it's worth) says no radiation was leaked whatsoever.
Nuclear vs. conventional explosions should be distinguishable at closer distances, but South Korea hasn't made a statement on that yet.
It's a mixed bag.
It's entirely possible NK is bluffing as a cheap way to get themselves some credit in negotiations.
From a technical point of view ~20kt bombs are the simplest to make, but require more material than a smaller bomb. The last series of underground tests were in India and then Pakistan, with yields up to about 25kt.
Nuclear vs. conventional explosions should be distinguishable at closer distances, but South Korea hasn't made a statement on that yet.
It's a mixed bag.
It's entirely possible NK is bluffing as a cheap way to get themselves some credit in negotiations.
From a technical point of view ~20kt bombs are the simplest to make, but require more material than a smaller bomb. The last series of underground tests were in India and then Pakistan, with yields up to about 25kt.