For those who've paid attention, I live on the southern tip of Maine, very close to Portsmouth NH and the single runway Portsmouth International Airport. Pease Air Force Base and the Air National Guard operate out of there, so we get our share of military aircraft flying over our house. Here's an idea of the proximity from Flightradar24. The blue dot is me, and the cluster of planes between Newington and Kittery is the airfield. That's a Frankfort-to-JFK flight passing over the vicinity of our house.
Well, yesterday, I heard this strange low frequency rumble. What was strange about it was that it didn't seem to be right overhead, but was nevertheless intense enough to vibrate the house on and off for like 10 minutes. It was what I imagined an earthquake would be like; and we do have earthquakes, but those last for 2 seconds. All the usual stuff, like helicopters and Air Force jets and military cargo planes etc. also make a rumble, but they come from up in the sky, they build quickly, and you get an idea of when they pass over.
So after the 10 minutes of shaking the ground, it finally starts building into something thunderous in the sky. But it's much more widespread and intense than I've heard before, and now I have to go outside and see what the hell is up. It's here! What is it? Are we all going to die? I can't see anything at first, then I step out onto the driveway and look directly over the house. A formation of 3 crazy helicopter-like things are passing over. Something like this
I went onto our community forum and confirmed they're vertical-launch military vehicles, possibly preparing for Pres. Biden to visit Lewiston tomorrow. They could've been V-22 Ospreys, but looked a little more like the Valors above. In any case, they were moving out. Pretty intense. The extended rumble was probably them lifting-off from Portsmouth.