Earth’s magnetic field is the vector field generated primarily by dynamo action in the liquid outer core, where convective motion of electrically conducting iron alloys induces and sustains a predominantly dipolar geomagnetic field. It extends from the core through the mantle and crust into space, forming the magnetosphere via interaction with the solar wind. The field is characterized by its intensity, inclination, and declination, and exhibits secular variation, westward drift, and polarity reversals on geological timescales. It governs charged particle dynamics in near-Earth space, shapes radiation belts, and constrains models of core dynamics and planetary evolution.
How does the Earth generate its magnetic field? While the basic mechanisms seem to be understood, many details remain unresolved. A team of researchers from the Center for Advanced Systems Understanding at the Helmholtz-Zentrum ...
Planetary Sciences
Dec 16, 2024
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A trio of physicists, two with Coventry University, in the U.K., and the third with Laboratoire National des Champs Magnétiques Intenses, in France, has demonstrated how Earth's magnetic field may be influencing internal ...
Is there something strange and alien confined deep inside the Earth? Is it trying to break free and escape into the heavens? No, of course not.
Planetary Sciences
Nov 1, 2024
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193
Approximately 41,000 years ago, Earth's magnetic field briefly reversed during what is known as the Laschamp event. During this time, Earth's magnetic field weakened significantly—dropping to a minimum of 5% of its current ...
Planetary Sciences
Oct 10, 2024
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134
In May 2024, a geomagnetic storm hit Earth, sending auroras across the planet's skies in a once-in-a-generation light display. These dazzling sights are possible because of the interaction of coronal mass ejections—explosions ...
Planetary Sciences
Sep 27, 2024
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