North Korea has estimated 100 kiloton to 1 megaton nuclear fusion weapon test

Hours after the North’s sixth nuclear detonation, an announcer on its official Korean Central Television declared: “The hydrogen bomb test was a perfect success.”

Earlier monitors measured a 6.3-magnitude tremor near its main testing site, which South Korean experts reportedly said was nearly 10 times more powerful than the 10-kiloton test carried out a year ago.

US President Donald Trump called North Korea’s actions “very hostile and dangerous” in a series of tweets.

“North Korea has conducted a major Nuclear Test,” Trump wrote. “Their words and actions continue to be very hostile and dangerous to the United States.”