ScentCone writes "North Korea says that it has conducted its first nuclear weapons test and 'brought happiness to its people.' Japan and China earlier issued an unusual joint statement saying that such a test would be 'unacceptable.' As of 11:10PM EST, the USGS says that it has not detected any unusual seismic activity on the Korean peninsula in the last 48 hours." From the article: "The North said last week it would conduct a test, sparking regional concern and frantic diplomatic efforts aimed at dissuading Pyongyang from such a move. North Korea has long claimed to have nuclear weapons, but had never before performed a known test to prove its arsenal. The nuclear test was conducted at 10:36 a.m. (0136 GMT) in Hwaderi near Kilju city, Yonhap reported, citing defense officials." Update: 10/09 05:50 GMT by J : The U.S. Geological Survey reports a 4.2 magnitude quake; South Korean news is reporting a 3.58 magnitude event; the White House apparently confirms a nuclear test.