The United States and its allies should be able to determine within weeks whether North Korea’s nuclear test involved a hydrogen bomb — as it claimed — through a network of seismic and other devices that detect and measure nuclear explosions.
“They have pretty much surrounded North Korea” with such devices, said Greg Thielmann, an analyst at the Arms Control Association and former State Department intelligence analyst. “My guess is within a couple weeks the U.S. will have reached some conclusions.”
Experts will analyze both the size of the explosion and the radioactive particles emitted by the detonation, Thielmann and other analysts said.
Hydrogen bombs are far more powerful and complex than atomic bombs and difficult to make because they require fusion, or the fusing of atoms, rather than fission, the splitting of atoms that creates the power of atomic bombs.
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