Magnitude 5.1 seismic disturbance recorded in North Korea (CNN)A seismic event that registered magnitude 5.1 was recorded in northeast North Korea on Wednesday, the U.S. Geological Survey said. The event occurred 19 kilometers (12 miles) east-northeast of Sungjibaegam. The event is near the site of a 2013 underground nuclear test. South Korea's Foreign Ministry is holding an emergency meeting after reports of the seismic disturbance, the ministry told CNN. China Earthquake Networks Center in Beijing is describing the event as a "suspected explosion."