A hydrogen bomb is generally more powerful than a nuclear bomb.
Last December, North Korean leader Kim Jong-un claimed his country had developed a hydrogen bomb, a step up from the less powerful atomic bomb. More...
South Korean officials said they detected an ‘artificial earthquake’ near North Korea’s main nuclear testing site. The U.S Geological Survey measured the magnitude of the seismic activity at 5.1 on its website.
An official from the Korea Metrological Administration, South Korea’s weather agency, said it believed the earthquake was caused artificially, without elaborating, and originated 49 kilometers or 30 miles north of Kilju, the north-eastern area where North Korea’s main nuclear test site is located.
North Korea conducted underground tests to set off nuclear devices in 2006, 2009 and 2013, for which it has been subject to U.N. Security Council sanctions banning trade and financing activities that aid its weapons programme.
The test would further North Korea’s international isolation by prompting a push for new, tougher sanctions at the United Nations and worsening Pyongyang’s already bad ties with Washington and its neighbours.
'Will continue to strengthen nuclear programme'
In a statement after conducting its fourth nuclear test, North Korea's state news agency said it will not give up its nuclear programme as long as the United States maintained what it called "its stance of aggression".
