North Korea conducted a fifth ever nuclear test Friday morning, described by South Korea’s Joint Chiefs of Staff as the reclusive state’s “biggest-ever” with a yield reaching 10 kilotons.
The amount is almost double what Pyongyang claimed was a hydrogen bomb earlier this year.
South Korea’s military detected a magnitude 5.3 earthquake at around 9.30 a.m. (0130GMT) close to the Punggye-ri site where the North carried out its previous four tests since 2006.