North Korea's neighbors are looking for radiation from its nuclear test, but they might not find any. The North said the underground test site where it detonated what it described as a hydrogen bomb ...

Hydrogen bombs cause a bigger explosion, which means the shock waves, blast, heat and radiation all have larger reach than an atomic bomb, according to Edward Morse, a professor of nuclear engineering ...

North Korean leader Kim Jong-un asserted that his country has built a hydrogen nuclear bomb to “defend its sovereignty and the dignity of the nation.” If true, it would mark a significant and ...

Pyongyang last night conducted its first test of a hydrogen (thermonuclear) bomb. The device was ten times more powerful than any of those detonated in North Korea’s five earlier atomic (fission) ...

The White House says the U.S. government's early analysis of underground activity in North Korea "is not consistent" with that country's claim of having conducted a successful hydrogen bomb test.

In northwest North Korea, Mount Mantap became the center of the country’s nuclear testing program between 2006 and 2017, when six underground detonations were carried out beneath the mountain. The ...

"Such actions are fraught with further aggravation of the situation on the Korean peninsula, which is anyway marked by very high potential of military and political confrontation," said the ministry's ...

A North Korean official announced Monday the communist country possesses a hydrogen bomb and ballistic missile strong enough to detonate all of the Manhattan borough of New York, leaving it in “ashes.

A senior North Korean official has issued a stern warning to the world that it should take "literally" his country's threat to test its to test a nuclear weapon above ground. The official, Ri Yong Pil ...