North Korea claims to have successfully tested a hydrogen bomb.

A reported earthquake in North Korea Wednesday raised suspicion that the secretive nation has conducted its first nuclear weapons test in more than two years, in defiance of continuing United Nations sanctions.

Shortly after the seismic tremor, North Korea surprised analysts by saying it had conducted a successful hydrogen bomb test. A hydrogen bomb is generally considered to be more powerful than a typical nuclear explosive.

The U.S. Geological Service reported that a magnitude-5.1 earthquake occurred 30.4 miles from the city of Kilju, North Korea, where the country’s Punggye-ri nuclear test site is located.

That is the same area where North Korea conducted nuclear tests in 2006, 2009 and 2013.

USA, first country that successfully tested in 1952.
Russia tested in 1953.
Britain tested in 1957.
China tested in 1967.
France tested in 1968.

Source- USA Today