Scientists have used satellite data to determine the size of the bomb North Korea detonated in 2017. Results suggest it could have been twice as powerful as U.S. intelligence predicted at the time.
The nucler weapon detonated underground by North Korea in 2017 could have been 17 times as powerful as the"Little Boy" bomb dropped on the Japanese city of Hiroshima in 1945., the North Korean blast released energy equivalent to 245 and 271 kilotons of TNT. In contrast, the"Little Boy" bomb that the U.S. deployed over Hiroshima contained a blast yield of 15 kilotons.
While most nuclear tests are measured using the same networks used to monitor earthquakes, there are no stations openly releasing seismic data near the test site used by North Korea in 2017. This makes it extremely hard to determine the location and calculate the size of the bomb.reported at the time, everyone outside of the North Korean regime had to make an educated guess as to the size of the explosion—and these varied substantially.reported.
Sreejith and colleagues used a technique called Synthetic Aperture Radar Interferometry , which produces maps of surface deformation from radar images collected in space. This process enables scientists to track changes in land deformation over time and in this case, land changes directly above an underground test chamber in Mount Mantap, northeast North Korea, where the bomb was tested in 2017.
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