VIENNA (Sputnik) – Randy Bell said the first signals from seismic registers from the assumed blast became available at 02:30 GMT one hour after the actual explosion occurred.
Bell said that 27 international stations had registered the shocks that were quite similar to those of the 2013 nuclear bomb test by Pyongyang.
Earlier on Wednesday, an earthquake occurred in South Korea, prompting Seoul's suspicions that Pyongyang had performed a nuclear test. North Korea subsequently confirmed that it had successfully tested a hydrogen bomb.
