UNCONFIRMED REPORTS of a North Korean nuclear test.

UPDATE: Tentative confirmation from South Korea. And a claim from North Korea. (Thanks to Dan Riehl for the links).

On Fox News however, the USGS is saying it hasn’t detected any unusual seismic activity in Korea.

More here.

ANOTHER UPDATE: Wretchard interviews Dr. Robert Ayson of the Graduate Studies in Strategy and Defence at the Australian National University on the subject of how Australia and Japan might react.

And here’s a big roundup from Pajamas Media.