A nuke wouldn't emit measurable GWs, but it would emit seismic waves. There are seismometers that are highly optimized for this task; LIGO, on the other hand, h

A nuke wouldn't emit measurable GWs, but it would emit seismic waves. There are seismometers that are highly optimized for this task; LIGO, on the other hand, has extremely advanced damping technology designed to filter out seismic and other environmental vibrations. I don't know the details of nuclear-detonation induced seismic activity, but it seems to me that LIGO would be a very inefficient observational tool. That said, I don't know if anyone has looked at our data in the vicinity of e.g. DPRK nuclear tests to see if any nuclear detonations are visible in the strain timeseries.