![]() South Korean lawmaker Lee Cheol Woo says the country's spy agency told him in a private briefing that Pyongyang may not have conducted a hydrogen bomb test at all, given the relatively small size of the seismic wave reported. North Korea's first three nuclear tests, from 2006 to 2013, were A-bombs on roughly the same scale as the ones used on Hiroshima and Nagasaki, which together killed more than 200,000 people. While seismic data supported the claim of a large explosion, there was no immediate way to verify the type of weapon. North Korea claims Wednesday's test was of a a miniaturized hydrogen nuclear bomb. WHAT TYPE OF BOMBS DOES NORTH KOREA ACTUALLY HAVE? In an undated file photo, North Korean leader Kim Jong-un looks through a pair of binoculars during an inspection at a forward post off the east coast of the Korean peninsula. (The largest orange circle denotes the thermal radiation radius, the area where the explosion can cause third-degree burns the green is the radiation radius, where radiation doses are high enough to kill most people over the course of hours or weeks.) The NUKEMAP tool designed by nuclear-weapons historian Alex Wellerstein. Here's an example of how much more destructive a hydrogen bomb can be than an atomic one, as calculated by EXAMPLE: WHAT WOULD HAPPEN IF OTTAWA WERE BOMBED What's the same: Both the A-bomb and H-bomb use radioactive material like uranium and plutonium for the explosive material. in mind in making this H-bomb announcement," Tatsujiro Suzuki, professor at the Research Center for Nuclear Weapons Abolition at Nagasaki University, told Associated Press. ![]() ![]() "That the bomb can become compact is the characteristic, and so this means North Korea has the U.S. More compact: Hydrogen bombs can be made small enough to fit on a head of an intercontinental missile. "In theory, the process is potentially infinite. "Think what's going on inside the sun," Takao Takahara, professor of international politics and peace research at Meiji Gakuin University in Tokyo, told Associated Press. Stars also produce energy through fusion. The hydrogen bomb, also called the thermonuclear bomb, uses fusion, or atomic nuclei coming together, to produce explosive energy. Atomic bombs rely on fission, or atom-splitting, just as nuclear power plants do. More explosive: Compared with the atomic bomb (the kind dropped on Japan in the closing days of the Second World War), the hydrogen bomb can be far more powerful – by 1,000 times or more, experts say.
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