Seismic activity was detected Saturday near the site of North Korea's Punggye-ri nuclear site, but it is not known whether a nuclear test caused the development.
원문출처 : http://www.cnn.com/2017/09/23/asia/north-korea-seismic-activity/index.html
원문출처 : http://www.cnn.com/2017/09/23/asia/north-korea-seismic-activity/index.html