North Korea missile crisis: 5.1 magnitude tremor sparks nuclear test fears

North Korea appears to have conducted a sixth nuclear test, the South's Yonhap News Agency said today citing military officials, just hours after Pyongyang claimed to have developed a hydrogen bomb that could be loaded into a long-range missile.

USGS recorded what they described as a shallow 5.1- magnitude "mining explosion"  24 kilometres east northeast of Sungjibaegam in North Korea, in an updated report.

An artificial quake was detected at 12:36 pm (local time) in areas in the North Hamgyeong Province, the Korea Meteorological Administration told AFP.