Britain's foreign secretary Boris Johnson said: "They (North Korea) seem to be moving closer towards a hydrogen bomb which, if fitted to a successful missile, would unquestionably present a new order of threat", adding that there were no palatable military solutions.
South Korea's weather agency said the artificial natural disaster caused by the explosion was five times to six times stronger than tremors generated by the North's previous five such tests. For context, the bomb dropped on Hiroshima by the USA had a 15-kiloton yield. The defiant move by the reclusive nation is seen as a major step in its longstanding efforts to be able to hit the US mainland with a nuclear attack. Those threats have not deterred the North's nuclear weapons program. "This is not just a game changer, it's a game over".
The North has given the ultimate demonstration of its power by testing an H-bomb, Cha Du-Hyeogn of Asan Institute of Policy Studies said, and wanted the U.S. to believe its claims. The outstanding nations are China, Egypt, North Korea, India, Iran, Israel, Pakistan and the United States.
The test comes amid heightened regional tension following Pyongyang's two tests of ICBMs in July that potentially could fly about 10,000 kilometers, putting many parts of the U.S. mainland within range.
"The pictures show a more complete form of a possible hydrogen bomb, with a primary fission bomb and a secondary fusion stage connected together in an hourglass shape", Lee said.
United Nations atomic energy agency: Iran complying with nuclear deal
Although Russia, China, Britain, France and Germany also signed on to the pact, Iran and the United States were the key players. They've produced eight reports since January 2016 showing that Iran is in broad compliance with the accord, called the JCPOA.
"Vladimir Putin said the global society should avoid being overwhelmed by emotion, it should act calmly and prudently".
"It would show that their design, whatever the specific design, has achieved a yield that is capable of destroying modern cities".
The North claims the device was made domestically and has explosive power that can range from tens to hundreds of kilotons.
North Korean leader Kim Jong Un provides guidance on a nuclear weapons program in this undated photo released by North Korea's Korean Central News Agency (KCNA) in Pyongyang on September 3.
The shape shows a marked difference from pictures of the ball-shaped device North Korea released in March a year ago, and appears to indicate the appearance of a two-stage thermonuclear weapon, said Lee Choon-geun, senior research fellow at South Korea's state-run Science and Technology Policy Institute.
President Trump Set to Speak in Springfield
Mr Trump said the USA has surrendered its competitive advantage with one of the highest corporate tax rates in the world. The Republican Missouri Attorney General has also pushed Congress to support Trump's tax reform agenda.
"North Korea has conducted a major Nuclear Test".
"This means explosions can happen double and triple".
"For the North Koreans to have such a powerful and expensive [device] is a bit of overkill - it simply does not make sense", Lankov said.
The US has joined North Korea's regional neighbours in condemning the secretive communist state's latest nuclear weapons test. North Korea's previous largest was thought to be anywhere from 10 to 30 kilotons. Such a strike would involve detonating a bomb in the atmosphere, instead of firing a long-range missile at a major U.S. city.
Some American policymakers and experts have raised concerns about such an attack, which could cause a massive power surge and deal a devastating blow to the USA electric grid and critical infrastructure.
Microsoft's mixed reality headsets will work with Steam
Today, Microsoft announced the "first wave" of this content plan, confirming that it will include Halo developer 343 Industries . Again, this is just a teaser, as Microsoft will be releasing more details on the Windows Mixed Reality platform during IFA 2017.