Earthquake reported near North Korea nuclear test site, possibly man-made

North Koreans gather at Kim Il Sung Square, following their leader Kim Jong Un's new year address in Pyongyang, North Korea, on January 05, 2016.

Seoul: An earthquake that appears to have been man-made near a known nuclear testing site in North Korea was detected by several monitoring agencies on Wednesday.

The United States Geological Service reported a 5.1 magnitude quake that South Korea said was 49 kms (30 miles) from the Punggye-ri site where the North has conducted nuclear tests in the past.

"We suspect a man-made earthquake and are analysing the scale and epicentre of the quake with the geoscience and mineral resource institute of South Korea," a Korea Meteorological Administration official told Reuters by phone.