North Korea conducted its sixth and most powerful nuclear test on Sunday, which it said was an advanced hydrogen bomb for a long-range missile, marking a dramatic escalation of the regime’s stand-off with the United States and its allies.
The announcement from Pyongyang came a few hours after international seismic agencies detected a manmade earthquake near the North’s test site, which Japanese and South Korean officials said was around 10 times more powerful than the tremor picked up after its last nuclear test a year ago.
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There was no independent confirmation that the detonation, which drew swift international condemnation, was a hydrogen bomb rather than a less powerful atomic device. But Japan’s Chief Cabinet Secretary Yoshihide Suga said Tokyo could not rule out the possibility that it was a hydrogen bomb.
