North Korea claims tested hydrogen bomb

North Korea claims to have tested hydrogen bomb on Sunday. The state media announced the testing of "two-stage thermonuclear weapons" as "complete success" and the bomb will soon be installed into intercontinental ballistic missiles. At the same time the US Geologic Service also detected a 6.3-magnitude earthquake from a nuclear test site in Pyunggye-ri, North Korea.

Tinuku North Korea claims tested hydrogen bomb

Pyongyang said on Sunday it had tested hydrogen bomb and was ready to be placed on an intercontinental ballistic missile. The US Geologic Service officer also detected a large vibration at the same time from the Pyungye-ri military site indicating such test had been conducted, although it still required verification.

South Korea since 2006 has conducted six underground nuclear tests and the final test in September 2016. The first five tests range from 0.7 to 25 kilotons of explosion in which South Korea estimates the final test has a ten-fold size from the last test with an estimated 100 kiloton.

To date North Korea has tested fission nuclear bomb in which chain reactions are triggered from the compression of radioactive materials using bullets or explosions. The thermonuclear bomb is a more advanced and powerful design in which a fission bomb ignites the second phase of the fission material to induce a fusion reaction and produce a much larger explosion.