I don't think they know, but it's related to the convection currents of Earth's molten iron core. Earth's N-S poles have reversed many times over geologic time.
27.11.2024 15:42
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I don't think they know, but it's related to the convection currents of Earth's molten iron core. Earth's N-S poles have reversed many times over geologic time.
Map of the migration of magnetic North on Earth over the years. In the last 20 years, the path headed form northern Canada, straight northward, crossing to the eastern hemisphere.
Earth's magnetic field has moved much more in the last 20 years than in the previous 400. You can see from the map that in recent decades it made a beeline North and it on it's way toward Russia at a faster rate than usual. Headed toward a magnetic pole reversal? Map made by me using NOAA data.