Lived in a 1890s townhouse in the French Quarter for eleven years and mate, the walls knocked back.
Tried every rational explanation - pipes, wood expanding, rats the size of small dogs (New Orleans special) - but nothing explained why it only happened between 3am and 4am on the dot, every single time. I started logging it. Same rhythm too, three slow knocks then one sharp one, which honestly felt more like communication than settling foundations.
Did a full EMF sweep once and the readings spiked right where the knocking originated, which either means something genuinely weird or the houses electrics were a disaster, probably both knowing this city.
Anyone else noticed a specific time pattern with theirs? That's the bit that gets me, if it was structural you'd expect randomness not a schedule.