Unfortunately it came and went without me bothering to get a screenshot from the 'safety alert system' or whatever the hell they have on US phones

Ultimately it was clear it was coming from Mass, but I'm in PA, so I was curious if they sent it to the 'national alert' list or system, and wondered how they might do that!

I also got an 'emergency message' from Maine, basically saying 'the message you got was not from Maine but Mass, our 911 system is fine"

Of course then I wondered if I was going to get 47 more messages from the other states!

Ultimately it sounds like it wasn't the national system, but maybe they somehow sent it to SOME other states, but not all.

Just was really weird.

Thanks all for chiming in!