MORE ON NORTH KOREA’S LATEST NUCLEAR TEST: How powerful was the nuke? “…more powerful than the bomb dropped on Hiroshima, according to some estimates.” The seismic footprint indicated the device produced a 20 kiloton to 30 kiloton blast. The NorKs intend to build a standardized and miniaturized nuclear weapon. Then they’ll mount them on ballistic missiles. Then what? Well, they routinely threaten South Korea, the US and Japan with nuclear attack. Have a nice day.