13:03 - 04/09/2017
Military vehicles carry missiles with characters reading 'Pukkuksong' during a military parade marking the 105th birth anniversary of country's founding father, Kim Il Sung in Pyongyang, April 15, 2017. REUTERS / Damir Sagolj TPX IMAGES OF THE DAY
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South Korean military officials on Monday estimated the strength of the North Korean nuclear test at 50 kilotons.
This amount of energy means that the test was five times stronger than North Korea's nuclear test in September 2016, three times stronger than the US bomb that destroyed Hiroshima in 1945.
The US Air Force dropped the bomb on the Japanese city of Hiroshima in August 1945 during the Second World War, killing 140,000 people, some of whom were killed instantly and others died of radiation. The bomb destroyed an area of 13 square kilometers.
South Korea's defense ministry officials told parliament in Seoul to discuss the consequences of Pyongyang's nuclear test on Sunday.
It is the sixth and most powerful nuclear test conducted by North Korea so far, and it is an advanced hydrogen bomb designed to carry it on a long-range missile.
The experiment represented a major escalation of confrontation between the isolated communist state and the United States and its allies