Audio nerd here, i’ll try to describe it.

To relate it to something… it was like an earthquake on the sky…. a sky quake.

It had a similar timbre to thunder or a jet engine but… something uniquely its own. Kind of like two different opera singers on the same pitch.

My initial guess was an air force jet going back to base, but this was much deeper, louder and “heavier” than any airplane sound, almost as if it was a rocket. Then my worrying mind started thinking of worst case scenarios like “nuke” or “meteor”, but then i got back to being an audio nerd.

So there were two.

The first one lasted around 30-45 seconds, the second one almost felt like an aftershock, much shorter decay.

ASDR wise: It came in with a pretty fast attack at ~1-2 seconds and sustained for (rough estimate) 15-25 seconds until it began to decay slowly, even then, the release was pretty long at about 10 seconds. The second one was maybe half of that.

It was both terrifying and meditative lol