3 magnitude quake, while the strongest, this month, resulted in a 6"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华体会体育官网登录"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 bombDPRK conducted 华体会体育官网登录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 quake