North Korea detonated its sixth and most powerful nuclear weapon earlier this month at its north-east of Pyongyang.
The earthquake measured 3.4 on the Richter scale and has raised fears that North Korea is testing its missiles again.The head of the nuclear test monitoring agency CTBTO has said that its analysts are “looking at unusual seismic activity of a much smaller magnitude” in North Korea.
Seoul’s Korea Meteorological Administration said Saturday’s quake was detected in an area around Kilju, in northeastern North Korea.
The US Geological Survey (USGS) said it could not conclusively confirm whether the quake was man-made or natural.The Chinese earthquake administration said the initial quake occurred at depth of zero kilometres.
All of North Korea’s previous six nuclear tests registered as earthquakes of magnitude 4.3 or above.
Tensions have continued to rise since North Korea carried out is sixth nuclear test, which prompted further sanctions from the UN.
North Korea said its recent nuclear test was a detonation of a thermonuclear weapon built for its developmental intercontinental ballistic missiles.
Satellite photos of the area after the 3 September quake showed numerous landslides that were apparently caused by the huge blast, which North Korea said was a hydrogen bomb.
Nuclear proliferation watchdog CTBTO said on Saturday it had detected two seismic events in North Korea on Saturday but they were probably not deliberate explosions.
