North Korea’s nuclear weapons development

Feb 2005: Pyongyang announces possession of nuclear weapons

Oct 2006: First of four underground nuclear explosions takes place at Punggye-ri test site

May 2009: North Korea conducts second nuclear test one month after pulling out of six-party talks on its nuclear programme

Dec 2011: North Korean leader Kim Jong Il dies – son Kim Jong Un takes power

Dec 2012: Eight months after failed attempt, North Korea launches long range rocket which international community condemns as disguised ballistic missile test

Feb 2013: Third nuclear test attracts added UN sanctions

May 2015: Pyongyang claims to have tested a submarine-launched missile

Jan 2016: North Korea says it has successfully tested a hydrogen bomb

CHINA

NORTH KOREA Punggye-ri test site Yongbyon Pyongyang 

Yellow Sea (West Sea)

SOUTH KOREA

RUSSIA

Sea of Japan (East Sea)

100km 60 miles

Picture: Associated Press