"If the United States wants to rein-in the North Korean nuclear weapon and missile programs, it needs to convince Kim Jong-un that the things he cares about (mainly regime survival) are jeopardized by his bad behavior-only then is he likely to be prepared to compromise".
South Korea's meteorological agency said Sunday's explosion was as much as six times the size of the fifth nuclear test, in September past year, and 11 times the size of the January 2016 detonation.
He made a brief statement to reporters outside the West Wing of the White House after a small group of national security members had a meeting today with US President Donald Trump and the Vice President Mike Pence about the latest provocation on the Korean Peninsula.
Pyongyang claimed on Saturday that it had successfully tested a hydrogen bomb.
Mr Trump has signalled repeatedly that he is ready to use force to stop North Korea's pursuit of nuclear weapons that could reach the continental US.
South Korean officials estimated that the latest bomb contained five times more power than the atomic bomb the US detonated in Nagasaki, Japan, during World War II, The Wall Street Journal reported.
A foreign ministry spokesman said later that it had launched "stern representations with the person in charge of the North Korean embassy in China". A special session of the UN Security Council is scheduled for Monday.
The U.N. Security Council announced that it will have a meeting about the nuclear test tomorrow morning.
THERESA MAY has refused to back Donald Trump's Armageddon threat over North Korea, saying it's the UK's "overwhelming" preference for a peaceful and diplomatic resolution.
Joe Dunford, the chairman of the Joint Chiefs of Staff, joined Mattis for his announcement.
He also promised to meet with his military advisors over a course of action, which lead to Secretary of Defense General James Mattis making a statement on the situation on Sunday afternoon.
Korea is a rogue nation which has become a great threat and embarrassment to China, which is trying to help but with little success.
"The president wanted to be briefed on each one of them", he said.
"It is a cruel and evil dictatorship, he starves his own people", Mr Turnbull said.
Meanwhile, world leaders, including those from France, Russia and China, also condemned Sunday's test.
Asked about Mr Turnbull's call for China to do more, a foreign ministry spokesman said, "for a long time China has been working relentlessly for the settlement of this issue. we keep stressing we can't rely exclusively on China". According to several media reports, the North Koreans may now have the capability to fit such a missile with a device similar to the one tested Sunday. On Sunday, however, his government denounced North Korea's latest test and vowed to push for more United Nations sanctions aimed at further isolating Seoul's communist neighbor.