On the sidelines of the UN General Assembly in New York, North Korean Foreign Minister Ri Yong-ho told reporters Pyongyang might now consider detonating a hydrogen bomb outside its territory.
The site of the tremor is close to where the regime on 3rd September claimed to have detonated a thermonuclear weapon, in its sixth and most powerful nuclear test to date.
Tensions are extremely heightened after President Trumps horrific speech at the United Nations where he called Kim-Jong-un the "rocket man", Jong-un said that Trump's speech was the "most ferocious declaration of war in history". The U.S. Geological Survey and the European Mediterranean Seismological Center also detected the quakes but could not confirm their cause. The document framed business with North Korea as a national security threat and warned that banks could risk their reputation and economic consequences.
US Secretary of State Rex Tillerson said Washington's diplomatic efforts would continue but all military options were still on table.
In July, Beijing and Moscow proposed a "double-freeze" plan, which would see North Korea suspend its missile launches and nuclear tests in exchange for a halt in joint US-South Korea military drills.
The North accuses the United States, which has 28,500 troops in South Korea, of planning to invade and regularly threatens to destroy it and its Asian allies.
Small Earthquake Rattles North Korea, and the World's Nerves
Since Kim came to power after the death of his father Kim Jong Il in 2011, he has ramped up nuclear and missile weapon tests. Financial institutions are particularly at risk of theft as North Korea bleeds funds to support its nuclear program.
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"This doesn't in any way, of course, justify the DPRK's missile and nuclear program, but to ignore the reasons for them is to be very short-sighted", Nebenzia said, using the initials of North Korea's official name, the Democratic People's Republic of Korea.
China is to limit the export of refined oil products and totally ban exports of liquefied natural gas and gas condensate to North Korea, as well as textile imports from that country, the Ministry of Commerce has announced.
"So far, I don't know that the sanctions have had much of an impact on the average North Korean", Snyder said.
Comparing the president to an ageing gambler, the foreign minister said Mr Trump had turned the United Nations into a den of gangsters where bloodshed is the order of the day.
A magnitude 3.5 natural disaster struck at 4:29 a.m. ET Saturday a little more than 13 miles east-northeast of Sungjibaegam, North Korea, the US Geological Survey said.
While the USA pushed for a full ban on exports of oil to North Korea ahead of a vote on Resolution 2375, China and Russian Federation objected, supporting limits on exports instead of a full ban.
The United States and South Korea are technically still at war with North Korea because the 1950-53 Korean conflict ended with a truce and not a peace treaty. "In truth, nuclear weapons are clearly only leading to greater isolation, ignominy and deprivation", Tillerson said at the U.N. Security Council.