Chinese Seismic data on DPRK underground Test

The data originally supplied were of course dynamaic and so access to them is now irrelevant and the links have been removed. However see above for a wider discussion. There is no full international consesus about the size / nature of the test other than it was ;

1. Small maybe only 1/2 kiloton - within the range of a conventional explosive event (although large).

2. Possibly even a failed event, but certainly not a full result of a fissionary event.

For an excellent graphic and explanation of the difference between seismographic recording of shallow explosions and earthquakes go here