previous tests. officials have confirmed seismic activity in north korea. south korea says it detected what it called an artificial earthquake north of its border. the tremor, though, was different from what you might consider to be a normal earthquake. no further information at this stage is known. there s no official confirmation coming from anyone, least of all from pyongyang. north korea as we ve been telling you, widely expecting to carry out this nuclear test any day now. pyongyang is expecting to stage a high intensity we have anna koran standing by in seoul, south korea, we also have alex in tokyo. let s go to anna koran, who is in seoul for us right now. anna, you re on military maneuvers just a few days ago, with the south koreans and u.s. military there. there is a great deal of preparation in south korea for this event. essentially, given what s happened, what can the south koreans do right now? as we discussed yesterday, this is very much a waiting game. the