SEOUL, South Korea — 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 would ...

The Alaska Earthquake Center says its equipment picked up seismic activity after North Korea's claimed detonation of a hydrogen bomb Tuesday. But the seismic reaction is almost the same as the seismic ...

Some analysts questioned whether Wednesday's test was indeed of a hydrogen device. North Korea said it had successfully conducted a test of a miniaturised hydrogen nuclear device on Wednesday morning, ...

TOKYO — The announcement Wednesday from North Korea that it had carried out a nuclear test brought to the front lines of global attention a phrase not often heard since the Cold War — "the H-bomb." As ...

Richard L. Garwin, an architect of America’s hydrogen bomb, who shaped defense policies for postwar governments and laid the groundwork for insights into the structure of the universe as well as for ...

TOKYO (AP) — North Korea says it successfully detonated a hydrogen bomb in its latest nuclear test Sunday. Outside experts haven't been able to verify that claim, but say it's plausible. If true, it ...