Jayita Sarkar, Assistant Professor of International Relations at the Frederick S. Pardee School of Global Studies at Boston University, published a recent Op-Ed examining how the United States could potentially relieve tensions with North Korea without using a military strike or sanctions. "A sound wave, which is usually generated in the event of an artificial quake, was not detected".
A few hours after China announced the enforcement of the new UN Security Council sanctions against Pyongyang, Beijing reported that an quake, most likely caused by an explosion, was detected in North Korea.
Tensions between the United States and North Korea have ratcheted up after Pyongyang conducted its sixth and most powerful nuclear test September 3, prompting the United Nations to impose even tougher sanctions last week.
The US State Department stated that Washington will shoot down a North Korea's missile if it flies over the territory of Guam.
North Korean textile exports in 2016 totaled $750 million, according to South Korea's Korea Trade-Investment Promotion Agency.
North Korea has abundant coal but depends nearly entirely on imports for oil and gas.
In July, North Korea carried out two ballistic missile tests.
The event follows a turbulent week between the USA and North Korea, with leaders Donald Trump and Kim Jong Un trading insults.
"Regarding which measures to take, I don't really know since it is what Kim Jong-un does", said Ri in a CNN report.
A magnitude 3.5 natural disaster struck at 4:29 a.m. ET Saturday 22 kilometers (more than 13 miles) east-northeast of Sungjibaegam, North Korea, the US Geological Survey said.
"Our analysis shows that it was a natural quake".
Ri's comments followed Kim's extraordinary statement lashing out at President Trump, calling the American leader "deranged" and vowing that Trump would "pay dearly" for his threat to destroy North Korea.
China -- by far the North's biggest supplier and key diplomatic protector -- confirmed in a statement late Friday it would adhere to the new sanctions from October 1.
Talking about the nuclear issue on the Korean Peninsula, Wang and Pence acknowledged the important consensus both sides have on the de-nuclearisation of the peninsula and the need to safeguard the worldwide non-proliferation regime.
He said Mr Trump had insulted his country in the eyes of the world, and threatened to "surely and definitely tame the mentally deranged United States dotard with fire".