From this BBC NEWS article:
A big explosion rocked a northern province of North Korea near the border with China last week, South Korea’s Yonhap new agency is reporting.
The blast on Thursday was seen from a satellite, Yonhap quoted an unnamed source in Beijing as saying.
The cause has yet to be determined, the source said.
In April, an explosion at a railway station in North Korea killed more than 150 people – but Pyongyang only admitted the incident three days later.
Yonhap quoted a diplomatic source in Seoul as saying a mushroom cloud, with a radius of 3.5-4 kms (2.2-2.5 miles), was spotted in Kimhyungjik county in Yanggang province.
But Seoul’s top negotiator with North Korea, Unification Minister Chung Dong-young, reportedly played down the possibility that it might have been a nuclear weapons’ test.
He said South Korea was trying to get confirmation of the explosion and its effects, Yonhap reported.
The blast is said to have happened on 9 September, as North Korea marked the 56th anniversary of its founding.The AP story just out has similar details, but does not have the South Korean reaction.
If it’s a nuclear weapon don’t you think we would already know? That big of a mushroom cloud would be A-bomb size and leave a hell of a radiation finger print (feel free to correct me – as I claim no special expertise in nuclear and non-nuclear explosion investigation). Either way North Korea looks like it’s going to be moving up on the The Pentagon’s New Map, based on this incident and today New York Times article.
China wanted Hong Kong pretty badly; maybe we can talk them into annexing North Korea – by force.