SEOUL, SOUTH KOREA - JANUARY 06:  Ko Yun-hwa, The Korea Meteorological Administration Administrator briefs seismic waves that were measured in South Korean cities, at the Korea Meteorological Administration center on January 6, 2016 in Seoul, South Korea. North Korea confirmed it has conducted a hydrogen bomb test after South Korea's Metrological Administration detected an 'artificial earthquake' near  Punggye-ri, North Korea's main nuclear testing site on January 6, 2015.  (Photo by Chung Sung-Jun/Getty Images)