Columbus day in the US, celebrating the Old World’s discovery of a new world.
And, another new world dawns: North Korea announces their first nuclear weapons test.
The USGS page, confirming a seismic event of 4.2 magnitude, has maps.
I’d be willing to bet a lot of people on the Pacific rim didn’t get much sleep last night.
Update: in the chance this was a fizzle and not fissile, maybe someone was trying to dismantle it.