A magnitude 3.4 earthquake, at a depth of 0 kilometers, has been recorded near the Kilju area in the North Hamgyeong Province of North Korea, according to the China Earthquake Networks Center.
The ‘quake’ occurred at approximately 08:30 GMT (16:29 local time) on Saturday, reports South Korea’s Yonhap news agency. Kilju is home to the Punggyeri nuclear site, where North Korea’s sixth and largest nuclear test was conducted on September 3.
Japanese news agency Kyodo reports that the quake was caused by a “suspected explosion” at the site, while Yonhap reports, that as of right now, the Korea Meteorological Administration believe the quake “occurred naturally.”
„A sound wave, which is usually generated in the event of an artificial earthquake, was not detected,” an agency official said, as cited by Yonhap .
Lassina Zerbo, Executive Secretary of the Nuclear proliferation watchdog the Comprehensive Nuclear-Test-Ban Treaty Organization (CTBTO) confirmed that an investigation is already underway following „unusual seismic activity.