Bump
Acoustic wave also detected, they are sure that it was a man-made earthquake.
short summary: Acoustic wave was detected on 12:16:30 KST at an acoustic wave observatory located in Kosung, S. Korea (right below the eastern end of DMZ)
Seismic wave detected at 11:57:51 KST.
Took about 19 minutes for acoustic wave to travel from Kilju, N. Korea to Kosung, S. Korea.
They say the acoustic wave originated from the same location.
Link:
http://www.yonhapnews.co.kr/bulletin/2013/02/12/0200000000AKR20130212127200063.HTML