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North Korea's nuclear tests causing earthquakes, experts say

North Korea's nuclear tests causing earthquakes, experts say
From CBC - October 13, 2017

South Korea saidit detected an earthquake Friday near North Korea's main nuclear test site, the fourth since the country's sixth and most powerful nuclear test explosion last month.

Some experts suggested the area is now too unstable to conduct more bomb tests.

The magnitude 2.7 quake occurred about 54 kilometres northwest of Kilju, the town where the test site is located in northeastern North Korea, according to officials at South Korea's Korea Meteorological Administration.

Officials said the quakewas not man-made and did not appear to cause any damage in the area.

The officials, who requested anonymity citing department rules, said they believe the four quakes probably happened because the underground nuclear test on Sept. 3 weakened or affected the tectonic plate structures in the area. The region is not one where earthquakes naturally occur and no quakes were detected after the five smaller nuclear tests North Korea has conducted since 2006.

The officials declined to say how the recent quakes might have affected the area and the test site, where all of North Korea's nuclear bomb tests have taken place. But some civilian experts said North Korea may stop using the site.

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