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Mysterious shift in the Earth's magnetic field asks scientists to solve world magnetic model that guides navigation



The updated version of the World Magnetic Model, which plays a key role in modern navigation, was due to be released on January 15th. This was postponed due to the ongoing government shutdown. (19459013) Pixabay )

Earth's magnetic field is constantly moving, and because it is used to navigate properly on the planet, scientists must regularly update the World Magnetic Model (WMM) to account for the shift in the field.

World Magnetic Model

Researchers update WMM every five years. WMM is behind modern navigation used by Google Maps, planes and ships in the ocean

The National Oceanic and Atmospheric Administration (NOAA) maintains WMM's key role in modern navigation. While GPS is useful for navigation, it has limitations because it only provides the position. The magnetic field gives the orientation and direction you are facing.

The US Geophysical Data Center released the current version of WMM in 201

5. This should mean that an update is not due next year.

Irregular behavior of the Earth's magnetic field

For the reasons that still confuse scientists, the magnetic north pole is occupied. It has increasingly moved away from Canada and towards Siberia at an irregular rate.

Ciaran Beggan from the English Geological Survey in Edinburgh said it is moving about 30 miles a year.

"It didn't move much between 1900 and 1980, but it's really accelerated over the last 40 years," Beggan said.

Earth's magnetic field is generated by unpredictable changes in molten iron deep in the core of the planet. It is not yet clear what lies behind the erratic changes in the magnetic field, but some researchers believe it has something to do with the high-speed liquid iron wire in Canada.

"The location of the northern magnetic pole seems to be guided by two large-scale patches of magnetic field, one under Canada and one under Siberia. The Siberian patch wins the competition," University of Leeds geomagnetist Phil Livermore said at a meeting of the US geophysical union in Washington DC last month. 19659003] Fast changes in magnetic field Call for previous revision of WMM

The magnetic field changes so fast that scientists have to correct the model quickly because the navigation error is constantly increasing.

The strange field of the magnetic field meant that the researchers corrected the card earlier. The updated WMM was to be released on January 15, but it was moved to Jan. 30 because of the ongoing government shutdown.

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