TCS has a good backgrounder.

Last month I read that long Atlantic piece on what happens when North Korea explodes. It was a very useful, if gloomy, primer. Alas, it’s for subscribers only.

Here, via Instapundit, is the USGS quake map of the boom.

Josh Trevino has somethoughts at the Remedy.

As usual, Instapundit has other useful links.