The US had originally proposed harsher sanctions including a total ban on oil imports.
A South Korean presidential office spokesman said on Tuesday: "North Korea needs to realise that a reckless challenge against global peace will only bring about even stronger sanctions against them".
Trump also comment that he and Secretary of State Rex Tillerson had discussed the resolution and don't know if it will have "any impact" but that "it was nice to get a 15 to nothing vote".
Kim Jong-un, if he is really a leader of his people, ought to give up nuclear developments to protect the lives of his people. "We maintain the stance that when it comes to provocations, we impose tougher sanctions and pressure".
Since the North's sixth nuclear test, talk of redeploying tactical USA nuclear weapons to the South has gained traction, especially following a weekend report citing a White House official saying Washington could consider such a deployment if Seoul makes a request.
"We find that to be very important", Trump said.
"The amount of pressure North Korea has been put under economically is still far short of what we applied to Iran or even Iraq", the official said. "On the other hand, if North Korea continues its risky path, we would continue with further pressure".
The State Department's Thornton said Seoul had "come around very nicely" and appeasement not South Korea's policy.
Meanwhile, Kim himself was pictured in North Korea media meeting teachers with a massive grin on his face. "The forthcoming measures. will make the US suffer the greatest pain it ever experienced in its history".
The latest round of sanctions could have a significant effect on the North Korean economy, potentially reducing up to $1.3 billion in annual revenue. This summer, the US targeted two Russian companies with penalties for supporting North Korean missile procurement.
The North Korean ambassador to Russia, Kim Hyun Joon, accused the United States of using Pyongyang's "self-defense measures" as a pretext to worsen the situation in the country.
This undated picture, released by North Korea's official Korean Central News Agency (KCNA) on September 3, 2017, shows North Korean leader Kim Jong-un (C) looking at a metal casing of a suspected hydrogen bomb with two bulges at an undisclosed location.
Republican Rep. Ed Royce, the committee chairman, said USA and allied efforts should be "super-charged".
"As the Chinese cut off oil and gas, we're seeing them turn to Russian Federation", an unnamed senior official said to have knowledge of smuggling operations told the paper.
On August 23, the United States announced a set of secondary sanctions against 16 Chinese and Russian entities as part of its efforts to starve North Korea's military of the cash it needs to develop nuclear weapons.
"Today's resolution would not have happened without the strong relationship that has developed between President [Donald] Trump and Chinese President Xi".
Democrats on the House panel emphasized the need to develop diplomatic options to provide North Korea with incentives for good behavior.
"We regret to note that the DPRK continues relentlessly violating the resolutions adopted by the Security Council, and this inevitably leads to greater implications for the country and its leaders", Kazakhstan's Permanent Representative to the United Nations Kairat Umarov said.
They have not killed the sanctions, because they offer the perception something is being done about the North Korea crisis.
At the hearing, US officials released American intelligence findings on how North Korea smuggles coal and commodities to Russian Federation and China.
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