NORTH KOREA: 5 things to watch after North Korea's nuclear test

At about 3:30 zulu time, radio hobbyists monitoring a U.S. military frequency (4724z) noted a 249 character emergency action message emanating from Yokota Air Base. At about the same time, seismic stations across the world picked up an earthquake of magnitude 5.1. The point of origin seemed to be a swath of land on the Korean peninsula where North Korea has previously tested nuclear weapons. A few hours later, the North Korean official news agency confirmed what the electromagnetic spectrum (and numerous U.S. spy satellites and sensors) already reported: it had set off a controlled underground...
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