About the Author
Chad O'Carroll
Chad O'Carroll has written on North Korea since 2010 and writes between London and Seoul.
North Korea's Wednesday morning submarine-launched ballistic missile (SLBM) test was a success, state media said on Thursday, describing it has having been carried out without "adverse impact" on neighboring countries.
The launch, which was conducted under the supervision of Kim Jong Un at around 5:30AM SKT from North Korea's East Coast traveled some 500km South Korea's Joint Chief of Staff (JCS) said on Wednesday.