A magnitude two-point-five earthquake was detected in North Korea early Saturday near a nuclear test site.
 
The tremor took place at 7:45 a.m. in Kilju, North Hamgyong Province. The epicenter is two-point-seven kilometers away from the Punggye-ri nuclear site where North Korea conducted its sixth nuclear test in early September.
 
South Korea's Korea Meteorological Administration(KMA) said the quake is believed to be a natural one, but triggered by the September nuclear test. A KMA official said that Kilju is a rocky area and not prone to earthquakes but that tremors have been occurring in nearby regions as the nuclear explosion had affected the ground.
 
The KMA believes that the natural quakes are aftershocks of a magnitude six artificial earthquake that resulted from the test. 
 
The Saturday tremor is the fourth of its kind believed to be caused by the September nuclear testing. 
 

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