Previous North Korean nuclear tests produced explosions which
increased by factors of 3 or 5 every time until reaching a size
equivalent to a normal atomic bomb in 2013, Park wrote.
Analysis of seismic
waves created by North Korea's fourth nuclear test on Wednesday shows
they were almost identical to those generated in its last test,
according to an analyst, undermining its 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 which increased by
factors of 3 or 5 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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