Anyone else notice the FAA flight restriction that went up over that Nevada site last month with zero explanation?

Mate I clocked that and went straight to the FAA site to double check I wasn't imagining it. Temporary flight restriction, no stated reason, middle of nowhere Nevada, lasted about nine days then quietly vanished like it never happened. I've been watching restricted airspace pop up over odd locations for about fifteen years now and the ones with no explanation attached are always the interesting ones. The ones that DO have an explanation are usually boring. It's the silent ones you want to follow. Anyone cross-reference the dates with anything unusual on the ground level - seismic readings, military traffic, local reports? Would love to know if anyone in the area actually noticed anything or if we're just staring at a map going mad from our living rooms again.