That's pretty much the use case of the ShakeAlert system which can provide notice for earth quakes a few seconds in advance.

https://mil.wa.gov/asset/61f184c815ef0

Thanks, interesting.

Earthquakes are so far outside of my life experience that I'd completely forgotten about them.

https://en.wikipedia.org/wiki/ShakeAlert

That's the case for NERV(one of the disaster alert systems in Japan) at the very least.

https://twitter.com/UN_NERV

https://twitter.com/EN_NERV

It's used for notifying residents of earthquake, tsunami, and other disaster risks. Residents in japan for most immediate disasters will hear an alert through the national system (via phones, TV, radio, etc) and on top of that residents can check the NERV twitter or other sources to determine what degree of threat it is and what the next best course of action is.

One message to everyone is significantly easier case than "any message from anyone to anyone that subscribes" tho

Agreed. That's what the J-alert system is for. It sends out your basic "get to cover", "stay covered", "find high ground" type alerts but the NERV bulletins give you quite a bit more useful information on where else is affected and what impact that will have. Also worth noting that NERV supports a mobile app which can give you only the useful subset of notifications.

IMHO J-alert is for the first second and NERV is for the seconds after.

Was like "Huh, didn't know Anno took the name of a real organisation for his show", but from seeing the logo is the logo of the fictional anime organisation, the inspiration is clearly reversed. It seems a real app that gives notifications from actual earthquake warning systems, I wonder if they licensed that logo.

EDIT: Apparently they did some sort of cross promo deal with 3.0+1.0 after existing for a few years, so Khara is aware of them so they must have some sort of agreement to use that name and logo