Two seismic events recorded in North Korea were probably aftershocks from the state's missile test on 3 September, experts say.
The implementation of sanctions on Kim Jong Un regime is based on the UN Security Council's (UNSC) unanimous approval to the new sanctions on North Korea to ban all oil imports and freeze worldwide assets of the government and its defiant leader, in response to Pyongyang's sixth and strongest nuclear test explosion on September 3.
Separate geological agencies had detected two artificial tremors near North Korea's previous test site before the country touted its "perfect success" in a special announcement later that day.
As of Saturday afternoon, however, the Chinese had not modified their assessment, and the United States Geological Survey said in a statement, "We can not conclusively confirm at this time the nature (natural or human-made) of the event".
Atmospheric tests of nuclear-armed missiles, as NPR's Geoff Brumfiel reported, are risky for a host for reasons, including the potential for sending nuclear fallout in unpredictable patterns and, if a test were to be administered by North Korea, in the direction of the U.S. The test, which Pyongyang said was a detonation of a thermonuclear weapon built for its developmental intercontinental ballistic missiles (ICBM), generated a magnitude-6.3 quake.
While the cause remains unknown, alternative explanations suggested by North Korea analysts include tunnel collapses at the testing site. On its website, the USGS said that it "cannot conclusively confirm at this time the nature (natural or human-made) of the event".
Yesterday, minister of chinese Foreign ministry, Wang Yi used his speech to General Council of United Nations to ask for calm and restraint to parties involved and opted for a Korean peninsula free of nuclear weapons.
Iran "successfully" launches ballistic missile
Iranian President Hassan Rouhani had vowed to strengthen his country's military and ballistic capabilities in a live speech on state TV.
He says Trump's threat to totally destroy North Korea shows the president takes "very seriously" his responsibility to protect Americans.
All six of North Korea's nuclear tests thus far, dating to 2006, have been conducted in underground tunnels.
"We are about to run the most significant experiment in the use of secondary sanctions on North Korea to date, and perhaps the most significant such experiment with respect to any country ever", wrote Stephan Haggard, a North Korea expert at the University of California, San Diego.
The high-stakes standoff between the U.S., China and North Korea is heating up.
Kim Jong Un, in an unusual direct statement to the world, pledged hours earlier to take "highest-level" action against the US over President Trump's threat to "totally destroy" the North if provoked.
There is significantly less traffic on the roads in Pyongyang than earlier this year, although AFP reporters in the capital have not seen any evidence to back up Trump's tweet that: "Long gas lines forming in North Korea".
"The United States is still taking an attitude of skepticism toward North Korea's nuclear capabilities", Lewis said.
South Korea's weather agency, however, offered a different view.