North Korea claimed to have successfully tested a hydrogen bomb on Sunday Sep 03,2017

North Korea claimed on Sunday Sep 03,2017 to have successfully tested an hydrogen bomb, but what exactly makes an H-bomb different from a nuke? 

Thermonuclear weapons, informally known as hydrogen bombs or H-bombs, are more advanced and powerful types of atomic weapons.

The earliest atom bombs, including those dropped on Hiroshima and Nagasaki, were fission bombs that split atoms into pieces.

H-bombs are two-stage weapons, which use an initial fission reaction to trigger a fusion reaction, smashing the nuclei of atoms together in the same nuclear process that powers the sun

NORTH KOREA'S NUCLEAR TESTS

1. October 9, 2006: 0.7-2 kilotons
2. May 25, 2009: 2-5.4 kilotons
3. February 12, 2013: 6-16 kilotons
4. January 6, 2016: 7-10 kilotons
5. September 9, 2016: 15-25 kilotons
6. September 3, 2017: 100 kilotons