North Korea warned this week that it might test a hydrogen bomb in the Pacific Ocean, after saying the country had already successfully detonated one. A hydrogen bomb has never be ...

"The jury remains out on whether the June 2020 event was a nuclear test or not. What is certain is that we are in a time of nuclear uncertainty and it will continue for some time," Lori Dengler writes ...

Chinese researchers have successfully tested a non-nuclear hydrogen-based bomb, producing a fireball that burned over two seconds – 15 times longer than a comparable TNT blast. Developed by the China ...

SEOUL, South Korea — North Korea says it has conducted a hydrogen bomb test. The surprise announcement that complicates already difficult efforts to curb the country's push for a working nuclear ...

The test likely pushed Pyongyang's scientists and engineers closer to their goal of building a warhead small enough to place on a missile that can reach the U.S. mainland. But South Korea's spy agency ...

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 ...

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) ...

SEOUL, South Korea (AP) — Soon after the ground shook around its nuclear testing facility, North Korea trumpeted its first hydrogen bomb test — a powerful, self-proclaimed “H-bomb of justice” that ...

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.