Found this explanation,quoted from the writer:
Listen carefully—that’s eight short blasts. I asked a NorthWestern Energy worker what catastrophe would trigger such a warning. Dam failure, he said. Of course. This was on Ryan Island just downstream of Ryan Dam. (Ed Kemmick/Last Best News)
The place where I work has an emergency alert public address system. I heard them test it once. It sounded a bit like the first part of the tripod sound from War of the Worlds:
I think it wouldn’t take more than a couple blasts from that before I’d evacuate something.
One of the creepiest real things like this that exists is Chicago’s tornado warning siren
Unfortunately they don’t use the “Alternate Wail” signal in the video anymore. A few years back they switched to standard Wail.
EMISSION IMMINENT. TAKE SHELTER, STALKERS!
i would probably notice halfway in and panic because i wasn’t counting
What was seven or nine!?
That’s twelve, time for lunch!
I know what you’re thinking: “Did he hear eight blasts or only seven?” Well, to tell you the truth, in all this excitement I kinda lost track myself. But being as you’re supposed to evacuate the area, you’ve got to ask yourself a question: “Do I feel lucky?” Well, do ya, punk?
Pretty sure 7 blasts isn’t the “all clear nothing’s wrong here” signal
7 blasts and one in the middle which is 3/4 the length means you’re good to go!
While we’re all wondering what happens at 7 or 9 short blasts, I’m asking how a blast could even be long.
7 means 50% off at Golden Corral. 9 means thermonuclear missile imminent.
The dramatic tension would be better if we reverse them
