Alexander von Humboldt had once proposed to Georgiana that a new coordinate map be drawn using magnetic declination. If the equator had arisen from natural law, then the Prime Meridian involved far too many non-scientific factors.
In fact, even before Alexander von Humboldt, someone had proposed maps of magnetic declination and had even surveyed them. Besides discovering Halley's Comet, Halley published the first meteorological distribution map showing prevailing ocean winds in 1686.
He stayed on Saint Helena for two years, gathering information about voyages across the oceans from passing ships and navigators, and drew maps of the wind systems of the trade winds and monsoons.
Between 1687 and 1700, Halley embarked on explorations of the Atlantic Ocean as a captain and surveyor, producing an isogonic map of magnetic declination across the Atlantic region from 52 degrees north latitude to 52 degrees south latitude. The British Navy specially commissioned an expedition ship for his scientific expedition, whose purpose was to measure magnetic declination.
However, according to information Alexander von Humboldt had collected from the "Ugly Marquis," magnetic declination might have a double curvature in northern Asia. These materials had been provided to the marquis by two British scholars. After all, getting lost in the forests of Siberia was no laughing matter, and the marquis wanted to understand what was going on.
This double curvature of magnetic declination might lead to one consequence: magnetic declination could form a closed system originating from the same center.
Pomona remembered that Earth's magnetic poles did not seem to be at the North Pole. Earth's magnetic field was generated by molten iron in the outer layer of the core, and the movement of that liquid iron affected the positions of Earth's magnetic poles. Throughout history, Earth's magnetic poles had reversed many times; auroras had even appeared