From: "John Beamish" 

If you've got Google Earth then this link will take you to a USGS real time
list of earthquakes (although, in this case, "seismic events"
might be a better term).

http://earthquake.usgs.gov/eqcenter/recenteqsww/catalogs/eqs7day-age.kmz

Navigate until you get to North Korea and click on the dor in the north east.

The interesting data point, for me, is the depth at which the event
occurred.  Put this into context with NK radio's statement that no
radiation was released.

--- BBBS/NT v4.01 Flag-5