The Nuclear Safety and Security Commission said its land-based xenon detector in the northeastern part of the country found traces of xenon-133 isotope on nine occasions, while its mobile equipment off the country's east coast detected traces of the isotope four times.
Despite the tension, South Korea said it planned to provide US$8 million (S$10.8 million) through the UN World Food Programme and Unicef to help infants and pregnant women in the North.
North Korea carries out its nuclear tests in a complex of tunnels at its Punggye-ri site and images of the mountains, in this case Mount Mantap, above it can give experts a sense of where the device was tested exactly and how powerful it was.
Xenon is a naturally occurring, colorless gas that is used in manufacturing of some sorts of lights.
Reacting to the vote on Thursday, North Korea said the United States ought to "be beaten to death" for spearheading the penalties.
Moon said just because the United States and South Korea were now pursuing a firm path of sanctions and military drills, the time for negotiations wasn't over.
The defense analysts also said that the North's September 3 nuclear test, which Pyongyang said was of a hydrogen bomb, may have been much more powerful than previously estimated.
Analysts for 38 North, who are devoted to reporting on the regime, believe this activity may indicate that preparation for future tests in other underground portals is underway. That didn't work. North Korea withdrew from the treaty and continued its nuclear pursuit.
Pyongyang claims it detonated a hydrogen bomb in this latest test, which its state media swiftly described as "a ideal success".
Pyongyang's Korea Asia-Pacific Peace Committee, which handles the North's external ties and propaganda, also called for the break-up of the Security Council, which it called "a tool of evil" made up of "money-bribed" countries that move at the order of the US. China and Russian Federation share the view that the Kim regime will not give up its nuclear programme without security guarantees. "If I want to send the most compelling message, I have been persuaded that the triad in its framework is the right way to go", Mattis said.
Information for this article was contributed by Choe Sang-Hun of The New York Times and by Kim Tong-Hyung, Hyung-jin Kim and Robert Burns of The Associated Press.