North Korea startled the world in general and some leaders present at the BRICS summit in China in particular by successfully carrying out its sixth nuclear test on Sunday (Sep 3) and claiming that this was a hydrogen (H) bomb test. The technical parameters are yet to be confirmed independently by global agencies but preliminary estimates suggest that the latest test measured 6.3 on the Richter, thereby lending credence to the claim being made by Pyongyang.
The fusion of the atomic particles is at the heart of the H bomb, as opposed to fission that involves splitting the particle – the technology of the A or atomic weapon used in Hiroshima-Nagasaki in August 1945.

