WaPo — Unusual seismic activity was detected Tuesday near North Korea’s nuclear test site, but there was no immediate confirmation from Pyongyang or Seoul on whether the secretive police state had carried out its third nuclear test.
The tremor follows weeks of North Korean threats to build up its nuclear capacity and carry out an “all-out action of high intensity.”
The U.S. Geological Survey detected a 4.9-magnitude tremor at 11:58 a.m. local time in North Korea. South Korean President Lee Myung-bak convened an emergency national security meeting.
UPDATE: The Guardian – Regime confirms it set off its third nuclear bomb, signalled by an earthquake detected by South Korea, Japan and the US
Bogey man alert – North Korea tests ‘miniaturized’ nuclear device; may be seeking warhead for ballistic missile(McClatchy’s)