"Because the depth of the test is not known and the geology of the test site is uncertain, translating the seismic magnitude into yield is difficult, " said Acton, the Carnegie analyst.

NPR: NKorean Nuclear Test May Be Intelligence Windfall

"This is not experimentation but a test of the depth we have in our squad, " said South Africa coach Rudolf Straeuli.

BBC: Boks ring the changes

The Commission will comprise of senior legislators from G8 countries and the major emerging economies of Brazil, China, India, Mexico and South Africa to identify the most difficult domestic obstacles, and to explore in-depth, as well as politically test, the specific outcomes required from the G8 summit.

BBC: Low-carbon economy is not a luxury

What they need to do is get on with it and show their strength in depth, but this week is a massive test for them.

BBC: SPORT | Football | Europe | Chelsea face their biggest test

The announced targeted depth for Davy Jones is 29, 000 feet to test for additional objectives beyond those announced this week.

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