Anyone else notice the FAA flight restriction zones that keep popping up over rural Nevada that never make the news?

Been tracking these on the FAA's NOTAM database for about two years now and yeah, the pattern is weird. They pop up with almost zero notice, sometimes just hours ahead, and they're always listed as "military operations" with no further detail. The coordinates keep shifting too, which rules out it being a fixed installation.

What gets me is the timing. A few of the restrictions I logged appeared right after credible sighting reports in those same grid areas. Might be coincidence but theres enough of them now that I've started cross referencing with local sheriff call logs where I can get them.

Anyone else doing systematic tracking on this? Would be good to pool data because I'm just one person and I'm probably missing loads. If you're logging NOTAMs drop your methodology below, curious what tools people are using.

Not my area really, I'm more of a crop circle person, but this reminds me of how formations in Wiltshire sometimes get "managed" - fields cordoned off dead quick with no real explanation given. Like someone's always one step ahead. Maybe the same kind of thing going on with your Nevada zones @TexasSentinel, whoever's doing the restricting has advance knowledge of something.