Lamont-Doherty Seismologists Show Latest Korean Blast Larger Than 2006 Nuclear Test

(PhysOrg.com) -- Columbia seismologists who have intensively studied North Korea’s nuclear testing efforts say Monday’s blast was certainly a nuclear bomb, roughly five times larger than the country’s first test in 2006. The scientists, at Columbia University’s Lamont-Doherty Earth Observatory, say signals picked up by seismic stations, including one in China, showed clear characteristics of a shallow underground nuclear explosion with a force of probably several kilotons.

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<p><a href="http://www.physorg.com/news162658701.html">Lamont-Doherty Seismologists Show Latest Korean Blast Larger Than 2006 Nuclear Test</a></p> <p>(PhysOrg.com) -- Columbia seismologists who have intensively studied North Korea’s nuclear testing efforts say Monday’s blast was certainly a nuclear bomb, roughly five times larger than the country’s first test in 2006. The scientists, at Columbia University’s Lamont-Doherty Earth Observatory, say signals picked up by seismic stations, including one in China, showed clear characteristics of a shallow underground nuclear explosion with a force of probably several kilotons.</p>