Seismic activity detected close to North Korean nuclear test site

North Korean leader Kim Jong-Un.
(Image credit: Jung Yeon-Je/AFP/Getty Images)

An artificial earthquake was detected near North Korea's nuclear test site Friday morning, causing analysts to believe the country conducted its fifth test overall and first since January.

The United States Geological Survey reports a 5.3 magnitude quake occurred around 9:30 a.m. local time, not far from Punggye-ri, the site of previous nuclear tests, and the USGS National Earthquake Information Center said it was a "possible explosion." South Korea's national security council is now holding an emergency meeting, and Japan said it is very likely the explosion was a nuclear test. The country is celebrating the 68th anniversary of the start of the communist regime by Kim Il Sung, and Jeffrey Lewis, director of the East Asia nonproliferation program at the James Martin Center for Nonproliferation Studies, told The Associated Press it appears it was a test of "probably 20 to 30 kilotons, maybe more."

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Catherine Garcia, The Week US

Catherine Garcia has worked as a senior writer at The Week since 2014. Her writing and reporting have appeared in Entertainment Weekly, The New York Times, Wirecutter, NBC News and "The Book of Jezebel," among others. She's a graduate of the University of Redlands and the Columbia University Graduate School of Journalism.