The tremor occurred at 8:07 p.m. and the depth at its epicenter was six kilometers, according to the Korea Meteorological Administration (KMA).
The KMA said that the quake was detected 16 kilometers south-southeast of Changjin County in South Hamgyong Province. The weather agency added that it appears to have been a natural quake, not a weapons test.
"Artificial quakes from explosions create sound waves, but there were not sound waves detected this time," a KMA official said. "It's also far from North Korea's nuclear test area." Source from the Yonhap.