North Korea set off their sixth nuclear explosion a little while ago. They *claim* that is was not only an H-bomb but also miniaturized for installation on an ICBM.

So, you know, yay, I guess.

North Korea confirms sixth nuclear test

No information on the yield of the bomb, though a magnitude 6.3 quake was generated. The previous test, about 10 kilotons, created a 5.3 quake. Which might mean this blast would be on the order of 100 kilotons, safely in the H-bomb range.