Simply telling. I belive that we live inside the earth. On the https://concaveearth.net/ I found this second pic and literally first thought after was this magnetic wheel. I dont know why they think that pyramid is in core of the earth. But this quadrupole is same as magnetic wheel rounded shapes. I don't know of any phenomenon where a 1/4-circle curved strip of metal would significantly affect the rest, but the builder did it that way and I assume it matters. For example, if we look at vertical path of the feet at walking, it will also leave a trace resembling 1/4 of a circle.