The galactic magnetic current sheet, the sun's magnetic field and the earth's magnetic field are all interrelated. The earth's magnetic field is decaying exponentially. It will go to 0 within decades. They are lying in this one. It's not 30% in the last 3,000 years. More than half of the field loss has been in the last 30 years and it is accelerating: https://ec.europa.eu/research-and-innovation/en/horizon-magazine/earths-magnetic-poles-could-start-flip-what-happens-then There is already a hole over the South Atlantic and it's rapidly growing: https://www.esa.int/ESA_Multimedia/Videos/2020/05/Development_of_the_South_Atlantic_Anomaly