WHAT WE KNOW

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Hydrogen bomb explosion

Source: Wikimedia Commons

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914,624
How do we know that they detonated a nuclear bomb?
1,404
From measuring seismic activity and hypothesis testing to see if it was caused by natural or explosive causes. To confirm that it was an explosion from nuclear energy, 'sniffing' the air to measure changes in radioactive particles that are produced from nuclear fission such as Iridium, Strontium, and Ruthenium isotopes.
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909
There was a measured seismic event equivalent to a 5.1 magnitude earthquake from North Korea.
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843
North Korea announced the detonation.
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How do we know that the bomb they donated was a hydrogen bomb?
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The only evidence that it was a hydrogen bomb (fusion reaction) rather than a traditional nuclear bomb (fission reaction) is from North Korea's public announcement.
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We do not know.
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13
A North Korean television anchor, announced that a "miniaturized hydrogen bomb" had been successful and elevated the countries "nuclear might to the next level."
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814,602
Where was the detonation?
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The underground nuclear test was carried out at the Punggye-ri Nuclear Test Site, approximately 50 kilometres (30 miles) northwest of Kilju City in Kilju County.
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5,572
Underground.
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-200
In the ocean.
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814,599
What was South Korea's response?
1,105
The South Korean military in coordination with the United States Air Force flew a sortie involving one B-52 and fighter escorts over Osan, South Korea as a show of force.
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1,103
According to NBC news: South Korea blasted K-pop toward the rogue nation of North Korea over its nuclear tests. "We are sending out K-pop and information about life in South Korea as well as about North Korea," a South Korean military official told NBC News.
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Verbally condemned North Korea's military ambitions.
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What was China's response?
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The official response from China Foreign Ministry spokesperson Hua Chunying in a press conference: China "firmly opposes" the nuclear test. “China is steadfast in its position that the Korean Peninsula should be denuclearized and nuclear proliferation should be prevented to maintain peace and stability in Northeast Asia… We strongly urge the DPRK to honor its commitment to denuclearization, and to cease any action that may deteriorate the situation.”
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They firmly opposed the nuclear blast and have cooperated with the US, Japan, and South Korea over condemning the claim.
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When was North Korea's last nuclear test?
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February 12, 2013 North Korea announced that they had detonated their third successful nuclear bomb test. Yet neighboring countries could not verify if the 4.9 magnitude quake emanating from the test site was produced by a nuclear detonation or traditional explosives. No increase in radiation was detected by South Korea, Japan, or China.
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North Korea has detonated nuclear bombs in 2006, 2009, 2013, and now in 2016.
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