"What the concerned parties should do now is to strictly and comprehensively implement UN Security Council resolutions and make positive efforts to resolve the issue through dialogue," Chinese Foreign Ministry spokesperson Lu Kang said at a news briefing on FridayThe official Korean Central News Agency claimed it was a hydrogen bomb申博体育安卓版DPRK conducted its sixth and most powerful nuclear test to date on Sept 3Saturday's earthquake is likely to be a "delayed collapse earthquake", the joint report said, without elaborating on the cause of the quakeThe earthquake took place around 4:30申博体育安卓版 pm near the area of Kilju in the northeastern DPRK, just around 6 kilometers from the Punggye-ri facility where the country held its latest testThe Republic of Korea's weather agency also assessed the quake as natural, The Associated Press reported on Sunday