The Earth’s magnetic north pole has been shifting rapidly over the past few years, driven by changes in its outer core’s fluid motions. The molten iron at the center of the Earth generates the magnetic field that sustains the geodynamo process, which has been in place for billions of years.
According to geophysicist William Brown, smartphones use magnetometers and data from satellites like ESA’s Swarm mission to rely on the World Magnetic Model for precise orientation. The model predicts shifts in the Earth’s magnetic field using this data and updates occur every five years to refine predictions.
In 2019, an off-cycle update was necessary due to faster-than-usual outer core flow, which shifted the magnetic north pole. However, the upcoming 2025 update ensures smooth functionality of GPS and navigation systems for everyday users. Ongoing observations of the magnetic field provide valuable insights into the Earth’s inner dynamics and its evolving behavior.
The World Magnetic Model is an essential tool in understanding the Earth’s complex movements, allowing scientists to track changes in the planet’s magnetic field over time. By monitoring these shifts, researchers can better understand the planet’s core activity and improve our understanding of the Earth’s magnetic field.
Source: https://www.businesstoday.in/visualstories/news/magnetic-mayhem-earths-poles-shifting-faster-than-ever-whats-next-195383-18-12-2024