According to media reports, the quake is believed to have been caused by a suspected explosion at same location where previous tests have been conducted in Bu North Korea.
North Korean Foreign Minister Ri Yong-ho said in NY on Thursday hat Pyongyang may consider its most powerful test of a hydrogen bomb over the Pacific Ocean.
Kim on Friday threatened the "highest level of hard-line countermeasure in history" in a tirade against Trump´s warning that Washington would "totally destroy" the North if the U.S. or its allies were threatened. A USA official, who studies North Korea's military politics, said it was too early to determine if the test supported North Korea's claim that it had succeeded in developing a thermonuclear weapon, "much less one that could be mounted on an ICBM and re-enter the Earth's atmosphere without burning up". "The Air Force Technical Applications Center (AFTAC) is the sole organization in the Us federal government whose mission is to detect and report technical data from foreign nuclear explosions", the USGS said. The statement came in retaliation for the U.S. president saying Washington would "totally destroy" North Korea if it threatened the USA or its allies. Kim also said that he will make the USA "pay dearly" for threatening his country.
North Korea depends on China for nearly all its oil and gas but estimates of its consumption are low, leaving it unclear how Beijing's new limit will affect them.
It imposes a 180-day ban on vessels and aircraft that have visited North Korea from visiting the United States.
In public, China's foreign ministry has calmly advocated restraint, and warned Pyongyang and Washington on Friday not add oil to the fire.
Chinese support for sanctions against North Korea - and its faithful implementation of them - has been continually held up by world leaders as a key factor in deterring the rogue state from continuing its weapons development.
Lassina Zerbo, the executive secretary of the organisation said the tremor was probably an aftershock from the North Korea's nuclear test this month.
It will also ban imports of textiles from North Korea. "But sanctions are not the panacea", Wang said.
These sanctions, harsher than those approved before by the UN.and individual governments such as the United States, are created to choke North Korea's economy.
The Chinese Commerce Ministry said it would ban exports of condensate and liquefied natural gas to North Korea and limit textile imports from the North, starting 12 a.m. Saturday. That has led to several United Nations-backed sanctions packages as well as an escalating war of words between the young autocrat and U.S. President Donald Trump.
Trump announced the measures as he met the leaders of South Korea and Japan, the nations most immediately imperiled by North Korea's threats of a military strike.