SEOUL ¨C The seismic waves created by North Korea¡¯s fourth nuclear test on Wednesday were almost identical to the waves generated in its previous test, according to an analyst, undermining Pyongyang¡¯s claim to have tested a hydrogen bomb.
¡°Seismic signals from the January 2016 detonation at the North Korean nuclear facility bear an uncanny resemblance to the signals recorded for the February 12, 2013 detonation,¡± Jeffrey Park, a seismologist at Yale University wrote in a post on the Bulletin of the Atomic Scientists website.
Previous North Korean nuclear tests produced explosions that increased by factors of three or five every time until reaching a size equivalent to a normal atomic bomb in 2013, Park wrote.
The data indicates Wednesday¡¯s test used an ¡°identical design,¡± the analyst said.
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