The latest round of sanctions imposed by the United Nations Security Council were approved days after the North's most powerful nuclear test, on September 3.
In a report published Tuesday, the North Korea-watching website 38 North said the estimated yield of the bomb was believed to be around 250 kilotons.
North Korea has also tested a missile capable of reaching the United States, but experts say it is likely to be at least a year before it can field an operational nuclear missile that could threaten the USA mainland.
"These are by far the strongest measures ever imposed on North Korea. but we all know these steps only work if all nations implement them completely and aggressively", Nikki Haley, the USA ambassador to the United Nations, said after the vote.
The United States wants the Security Council to impose an oil embargo on the North, halt its key export of textiles and subject leader Kim Jong Un to financial and travel ban, according to a draft resolution seen by Reuters.
Following Monday's vote, Haley said despite the recent sanctions and an uptick in bombastic language from the Trump administration, the US was still hopeful North Korea would give up its nuclear ambitions. The sanctions also cap refined petroleum imports at 2 million barrels per year, about a ten percent cut. "Today we are saying the world will never accept a nuclear armed North Korea".
The petroleum limits would shave off roughly 10 percent of what North Korea now gets from China, according to the U.S. Energy Information Agency. "It remains on the table at the Security Council and we will insist on it being considered".
"To change its behaviour, deter it from carrying out illegal tests and bring it back to the negotiating table", Ms Bishop said.
China in particular has been pushing for an increase in diplomacy with North Korea and the U.S. directly engaging to try to resolve their disputes. Trump has vowed not to allow North Korea to develop a nuclear missile capable of hitting the mainland United States.
The ban started on August 28, the teller said.
Traditionally, the United States has discreetly negotiated with China on any North Korea sanctions before expanding talks to the full council once the five veto powers have agreed.
In negotiations on the latest resolution, diplomats said Russian Federation had questioned what leverage the Security Council would have left if North Korea continued to conduct nuclear and missile testing.
The tensions have weighed on global markets, but there was some relief on Monday among investors that North Korea refrained from conducting another missile test this past weekend to celebrate 69 years since its founding.