ould his possibly be an underground nuke test?
UPDATE:
http://www.google.com/hostednews/afp/article/ALeqM5jntKjLG2Y9N0a8MuIY8O__cOnWbQ
“NKorea confirms ‘powerful’ nuclear test”
1 hour ago
SNIPPET: “SEOUL (AFP) — North Korea said it staged a “successful” underground nuclear weapons test which was more powerful than its previous test of an atomic bomb almost three years ago.
The North “successfully conducted one more underground nuclear test on May 25 as part of the measures to bolster up its nuclear deterrent for self-defence in every way as requested by its scientists and technicians,” the Korean Central News Agency said.
“The current nuclear test was safely conducted on a new higher level in terms of its explosive power and technology of its control,” it said.
The results resolved “scientific and technological problems arising in further increasing the power of nuclear weapons and steadily developing nuclear technology.””