But how many people (other than hobbyists) have access to a short wave radio, and understand how to use it? With propagation and atmospheric noise issues, issues in heavy urban areas and lack of universal acceptance (compared to am/fm) the value of WWV as an emergency notification source is limited.
I'd think that there are many more NOAA capable radios out there in the hands of the public. NOAA is already a well established source of emergency alerts.
I was referring to Government uses more than civilians. Keep the transmitters up and running, and come up with an accessory use for government comm's (perhaps digital transmissions). In the meantime, the stations would still be on the air for SWLs, Hams, and whoever else uses them for whatever reason the rest of the time.
Because if the big one hits, a lot of the internet, satellite, etc. may not be working perfunctorily.
And NOAA is dependent on the power grid, also. The transmitters could lose power. Especially during a massive earthquake, EMP, or volcanic activity. FEMA estimates that during the coming Juan De Fuca 9 pointer, everything west of I-5 will basically be 'toast'. That includes powerlines.
In situations like that, governmental use of HF might be helpful. Like I said, the Military doesn't use HF just for fun. It's a back up system.
Of course, all that I'm saying will mean nothing to the powers that be. They will do whatever they do. It's nice to speculate, though.