Global Gathering — Experts are doubtful that North Korea successfully tested a hydrogen bomb, according to news report from a number of sources.
Based on it’s explosive power, the bomb wasn’t powerful enough to be a thermonuclear weapon.
New York Times reporter Choe Sang-Hun reported that South Korea’s National Intelligence Service estimated the explosive yield to be equivalent to six kilotons of TNT. Lee Cheol-woo, a South Korean National Assembly intelligence committee member told reporters that a hydrogen bomb would have yielded “hundreds of kilotons or, even if it is a failed test, tens of kilotons.”
"Let the world look up to the strong, self-reliant nuclear-armed state," Kim wrote in what North Korean state TV displayed.
According to the Congressional Research Service, North Korea has performed three nuclear tests which have increased in yield from less than a kiloton to almost seven kilotons. The estimated yield of the latest test may be lower than one of its previous detonations.
The seismic activity is also less than expected for a thermonuclear detonation. According to the U.S. Geological Survey, as reported by the Washington Post, the tremor was recorded at 5.1, the same size as a 2013 North Korean nuclear test and slightly larger than the two previous tests.
Officials examining a map that showed seismic waves from North Korea at the Korea Meteorological Administration center in Seoul, South Korea, on Wednesday.
The United States along with Britain, China, France, Japan, the European Union and NATO immediately condemned the announcement of the nuclear test. The United Nations Security Council scheduled an emergency meeting to consider its response, and whether actions taken would include expanding sanctions.
According to a U.S. Department of Defense (DoD) news statement, Defense Secretary Ash Carter and South Korean Defense Minister Han Min-koo spoke about the incident by phone where Secretary Carter reaffirmed the “ironclad commitment of the United States” to South Korea and in turn, Han emphasized the strength of the U.S.-South Korea alliance “and its vital role in assuring peace and stability on the Korean Peninsula and across the Asia-Pacific.”
Pentagon Press Secretary Peter Cook said in the DoD statement said that the two leaders affirmed that there should be consequences and that Carter and Han “pledged that both sides would coordinate appropriate alliance responses to these provocations. They also agreed to the importance of close coordination with the international community and regional partners in condemning this action.”