North Korea says it carried out H-bomb test; experts cast doubts

SEOUL, Korea, Republic Of -- 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 mark a major and unanticipated advance for its still-limited nuclear arsenal.

See Full Article

Pyongyang's announcement Wednesday was met with widespread skepticism, but whatever the North detonated in its fourth nuclear test, another round of tough international sanctions looms for the defiant, impoverished country.

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 thought the estimated explosive yield from the explosion was much smaller than what even a failed H-bomb detonation would produce.

The test was met with a burst of jubilation and pride in Pyongyang. A North Korean television anchor, reading a typically propaganda-heavy statement, said a test of a "miniaturized" hydrogen bomb had been a "perfect success" that elevated the country's "nuclear might to the next level."

A large crowd celebrated in front of Pyongyang's main train station as the announcement was read on a big video screen, with people taking videos or photos of the screen on their mobile phones and applauding and cheering.

In Seoul and elsewhere there was high-level worry. South Korean President Park Geun-hye ordered her military to bolster its combined defence posture with U.S. forces and called the test a "grave provocation" and "an act that threatens our lives and future." Japanese Prime Minister Shinzo Abe said, "We absolutely cannot allow this."

Washington and nuclear experts have been skeptical about past North Korean claims about H-bombs, which are much more powerful and much more difficult to make, than atomic bombs. A confirmed test would further worsen already abysmal relations between Pyongyang and its neighbours and lead to a strong push for tougher sanctions on North Korea at the United Nations. The Security Council quickly announced an emergency meeting.

A successful H-bomb test would be a big advance. Fusion is the main principle behind the hydrogen bomb, which can be hundreds of times more powerful than atomic bombs that use fission. In a hydrogen bomb, radiation from a nuclear fission explosion sets off a fusion reaction responsible for a powerful blast and radioactivity.

A South Korean lawmaker said the country's spy agency told him in a private briefing that Pyongyang may not have conducted an H-bomb test given the relatively small size of the seismic wave reported.

An estimated explosive yield of 6.0 kilotons and a quake with a magnitude of 4.8 (the U.S. reported 5.1) were detected, lawmaker Lee Cheol Woo said the National Intelligence Service told him. That's smaller than the estimated explosive yield of 7.9 kilotons and a quake with a magnitude of 4.9 that were reported after the 2013 nuclear test, he said, and only a fraction of the hundreds of kilotons that a successful H-bomb test's explosion would usually yield. Even a failed H-bomb detonation typically yields tens of kilotons, the NIS told Lee, who sits on the parliament's intelligence committee.

A miniaturized H-bomb can trigger a weak quake, but only the U.S. and Russia have such H-bombs, Lee cited the NIS as saying.

While also noting the quake was likely too small for an H-bomb test, Jaiki Lee, a professor of nuclear engineering at Seoul's Hanyang University, said the North could have experimented with a "boosted" hybrid bomb that uses some nuclear fusion fuel along with more conventional uranium or plutonium fuel.

After North Korean leader Kim Jong Un bragged of H-bomb capabilities in December, nuclear expert Jeffrey Lewis also questioned Pyongyang's ability to build such a bomb.

But, he wrote on the North Korea-focused 38 North website, "The North has now had a nuclear weapons program for more than 20 years. This program has yielded three nuclear tests. North Korean nuclear scientists have access to their counterparts in Pakistan, possibly Iran and maybe a few other places. We should not expect that they will test the same fission device over and over again."

In Pyongyang the announcement was greeted with an expected rush of nationalistic pride, and some bewilderment.

Kim Sok Chol, 32, told The Associated Press that he doesn't know much about H-bombs, but added that "Since we have it the U.S. will not attack us."

University student Ri Sol Yong, 22, said, "If we didn't have powerful nuclear weapons, we would already have been turned into the slaves of the U.S."

It could take weeks before the true nature of the test is confirmed by outside experts -- if they are able to do so at all. North Korea goes to great lengths to conceal its tests by conducting them underground and tightly sealing off tunnels or any other vents though which radioactive residue and blast-related noble gases could escape into the atmosphere.

U.S. Air Force aircraft designed to detect the evidence of a nuclear test could be deployed from a U.S. base on the Japanese island of Okinawa. Japanese media said Tokyo has also mobilized its own reconnaissance aircraft for sorties over the Sea of Japan to try to collect atmospheric data.

The test was unexpected in part because North Korea's previous nuclear test was in early 2013 and Kim Jong Un did not mention nuclear weapons in his annual New Year's speech. Some outside analysts speculated Kim was worried about deteriorating ties with China, the North's last major ally, which has shown greater frustration at provocations and a possible willingness to allow stronger UN sanctions.

Chinese Foreign Ministry spokeswoman Hua Chunying told reporters that Beijing "firmly opposes" Pyongyang's purported test and is monitoring the environment on its border with North Korea near the test site.

Just how big a threat North Korea's nuclear program poses is a mystery. North Korea is thought to have a handful of rudimentary nuclear bombs and has spent decades trying to perfect a multistage, long-range missile to eventually carry smaller versions of those bombs.

Some analysts say the North hasn't likely achieved the technology needed to manufacture a miniaturized warhead that could fit on a long-range missile capable of hitting the U.S. mainland. But there is a growing debate on just how far the North has advanced in its secretive nuclear and missile programs.

North Korea needs fresh nuclear tests for practical military and political reasons. To build a credible nuclear program, the North must explode new nuclear devices -- including miniaturized ones -- so its scientists can continually improve their designs and technology. Nuclear-tipped missiles could then be used as deterrents, and diplomatic bargaining chips, against its enemies -- and especially against the United States, which Pyongyang has long pushed to withdraw its troops from the region and to sign a peace treaty formally ending the Korean War.

"This is indeed a wakeup call," Lassina Zerbo, the head of the Vienna-based UN Comprehensive Test Ban Treaty Organization, which has a worldwide network of monitoring stations to detect nuclear testing, told AP by phone. "I am convinced it will have repercussions on North Korea and international peace and stability."

AP correspondent Hyung-jin Kim and writer Kim Tong-hyung in Seoul, Pyongyang bureau chief Eric Talmadge in Tokyo, and writer George Jahn in Vienna contributed to this story.



Advertisements

Latest Canada & World News

  • Melting pot Manchester stresses unity after concert attack

    World News CTV News
    MANCHESTER, England -- On the Manchester street they call the "Curry Mile," there are no longer just Indian or Pakistani restaurants. Instead, in a sign of the ever-changing face of this proudly multiethnic city, a hungry diner these days can choose between Halal snacks from Beirut, kebabs from Afghanistan or garishly colored sweets from India, among many others. Source
  • Hernandez days of beatings, Honey Buns

    World News Toronto Sun
    Former NFL star Aaron Hernandez’s days in jail were a depressing litany of beatings and gorging on Honey Buns. The one-time New England Patriot was often attacked by his fellow jailbirds and he battled with guards over his letters being confiscated. Source
  • Trump and pope focus on peace [Video]

    World News Toronto Sun
    VATICAN CITY — Handshakes, gifts, friendly small talk and big hopes for peace. Setting aside past differences and rude comments aside, U.S. President Donald Trump and Pope Francis put a determinedly positive face on their first meeting Wednesday at the Vatican. Source
  • B.C. NDP wins in Courtenay-Comox, leaving Liberals with minority government

    Canada News Toronto Sun
    VICTORIA — The B.C. NDP won the crucial riding of Courtenay-Comox on Wednesday, leaving the B.C. Liberals without the seats needed to form a majority government. The final results Wednesday saw the NDP’s Ronna-Rae Leonard win the riding with 189 votes, expanding a lead she had built earlier in the day as Elections B.C. Source
  • 'The Joker' points gun at traffic: Florida police

    World News Toronto Sun
    MIAMI — Police in Florida have managed to arrest the Joker without Batman’s help following reports of a green-haired man with tattoos on his face pointing a gun at traffic. A Miami-Dade police report says 29-year-old Lawrence Sullivan was arrested Tuesday evening and charged with carrying a concealed firearm. Source
  • Subpoenas for Michael Flynn’s documents pile up

    World News Toronto Sun
    WASHINGTON — Attorney General Jeff Sessions did not disclose contacts with foreign dignitaries, including the Russian ambassador, on a security clearance form he submitted as a United States senator last year, the Justice Department acknowledged Wednesday. The department said Sessions’ staff relied on the guidance of the FBI investigator handling the background check, who advised that meetings with foreign dignitaries “connected with Senate activities” did not have to be reported on the…
  • Manchester bomber's brother 'aware of all the details of the terrorist attack': Special Deterrent force

    World News Toronto Sun
    CAIRO — The father and younger brother of the suspect in the Manchester concert bombing have been detained in Libya, where anti-terror authorities said the brother confessed to knowing “all the details” of the deadly plot. Hashim Abedi, the 18-year-old brother of alleged British-born bomber Salman Abedi, 22, was detained in Tripoli Tuesday night, a spokesman for a Libyan anti-terror force said Wednesday. Source
  • Embattled Brazilian president orders troops to restore order

    World News CTV News
    BRASILIA, Brazil -- Brazil's president ordered soldiers to restore order in the country's capital Wednesday after some government ministries were evacuated during clashes between police and protesters who are seeking the leader's ouster. Tens of thousands of demonstrators marched to Congress to protest economic reforms that President Michel Temer is pushing through and to demand he step down amid a corruption scandal. Source
  • More arrests in both U.K., Libya after Manchester concert bombing [Video]

    World News Toronto Sun
    MANCHESTER, England — British security forces raided a building Wednesday in central Manchester as they investigated “a network” of people allegedly behind the city’s concert bombing. Hundreds of soldiers were sent to secure key sites across the country, including Buckingham Palace and the British Parliament at Westminster. Source
  • Britain on edge

    World News Toronto Sun
    Britain is a nation on the precipice. In the wake of Monday’s Manchester massacre following an Ariana Grande concert, the nation is on lockdown. Suicide bomber Salaam Abedi, 22, shocked the world when he set off a massive explosion, killing 22 and maiming scores of others. Source