"The incident was not a nuclear explosion, but had the characteristics of a natural quake," the China Earthquake Networks Center said late Saturday in a statement released online"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 Friday全新讯网新The official Korean Central News Agency claimed it was a hydrogen bombDPRK conducted its sixth and most powerful nuclear test to date on Sept 3Saturday's earthquake is lik全新讯网新ely to be a "delayed collapse earthquake", the joint report said, without elaborating on the cause of the quakeThe earthquake took place around 4:30 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 test