Earthquake Hits North Korea Near Nuclear Test Site
A series of tremors and landslides near North Korea’s nuclear test base likely mean the country’s sixth and largest blast has destabilised the region, and the Punggye-ri nuclear site may not be used for much longer to test nuclear weapons, experts say.
A small quake was detected early on Friday near the North’s nuclear test site, South Korea’s weather agency said, but unlike quakes associated with nuclear tests, it did not appear to be manmade. The tremor was the latest in a string of at least three shocks to be observed since Pyongyang’s Sept. 3 nuclear test, which caused a 6.3 magnitude earthquake.
Friday’s quake was a magnitude 2.7 with a depth of 3 km in North Hamgyong Province in North Korea, the Korea Meteorological Administration said. The United States Geological Survey (USGS) measured the quake at 2.9 magnitude at a depth of 5 km.
“The explosion from the Sept. 3 test had such power that the existing tunnels within the underground testing site might have caved in,” said Kim So-gu, head researcher at the Korea Seismological Institute.
According to 38 North, a Washington-based project which monitors North Korea, numerous landslides throughout the nuclear test site have been detected via satellite images after the sixth test. These disturbances are more numerous and widespread than seen after any of the North’s previous tests, 38 North said.
The explosion from the sixth test was large enough for residents of the Chinese border city of Yanji, 200 km (125 miles) north of North Korea’s nuclear test site, to feel the ground shake beneath their feet.
“The reason why Punggye-ri has become North Korea’s nuclear testing field is because this area was considered stable and rarely saw tremors in the past,” said Hong Tae-kyung, a professor of earth system science at Yonsei University in Seoul. “The recent small quakes suggest that the test might have triggered crust deformation.”
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