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September 3, 2017, 12:17 AM Tremor detected in North Korea, suggesting nuclear test

Last Updated Sep 3, 2017 12:42 AM EDT

A seismic tremor was detected near where North Korea tests nuclear weapons, suggesting the county had conducted its sixth nuclear test.

South Korea's military says North Korea is believed to have conducted its sixth nuclear test.

The Joint Chiefs of Staff in Seoul says in a statement South Korea's military has strengthened monitoring and readiness and is mulling a variety of possible responses that could be pushed together with its ally the U.S.

The apparent test came just hours after North Korea claimed that its leader has inspected the loading of a hydrogen bomb into a new intercontinental ballistic missile. 

The U.S. Geological Survey first measured the quake at 5.2 but then revised it upwards to 6.3 magnitude. 

The quake came just hours after North Korea's state-run media claimed the developed the ability to load a hydrogen bomb onto a new intercontinental ballistic missile.

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