<Tr> <Td> (Full screen) </Td> </Tr> <Tr> <Td> Location of North Korea's Nuclear tests 1: 2006; 2: 2009; 3: 2013; 4: 2016 / 1; 5: 2016 / 9; 6: 2017; V </Td> </Tr> <P> The 2006 North Korean nuclear test was the detonation of a nuclear device conducted by North Korea on October 9, 2006 . </P> <P> On October 3, 2006, North Korea announced its intention to conduct a nuclear test . The blast is generally estimated to have had an explosive force of less than one kiloton, and some radioactive output was detected . United States officials suggested the device may have been a nuclear explosive that misfired . </P>

When did north korea conduct its first nuclear test