Remanent magnetism, or remanence, is the magnetization that persists in a material after an external magnetic field is removed. It arises from the alignment and pinning of magnetic domains, controlled by factors such as crystal anisotropy, domain-wall energetics, and microstructural defects. In rock and mineral systems, remanent magnetism (including thermal, chemical, and depositional remanent magnetization) records the direction and intensity of past geomagnetic fields, enabling quantitative paleomagnetic and tectonic reconstructions. The magnitude and stability of remanent magnetism depend on grain size, composition, temperature history, and time-dependent relaxation processes such as viscous remanent magnetization.
To uncover the history of our solar system, it is necessary to study the dynamic evolution of the ancient solar nebula materials. These materials interacted and coevolved with the weak but widespread magnetic field of the ...
Planetary Sciences
Mar 3, 2026
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Researchers from the Department of Earth Sciences, University of Oxford, have resolved a long-standing debate about the strength of the moon's magnetic field. For decades, scientists have argued about whether the moon had ...
Planetary Sciences
Feb 25, 2026
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59
Earth's magnetic field is generated by the churn of its liquid nickel-iron outer core, but it is not a constant feature. Every so often, the magnetic north and south poles swap places in what are called geomagnetic reversals, ...
Planetary Sciences
Feb 5, 2026
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178
Magnetism on the moon has always been a bit confusing. Remote sensing probes have noted there is some magnetic signature, but far from the strong cocoon that surrounds Earth itself. Previous attempts to detect it in returned ...
Planetary Sciences
Feb 3, 2026
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21
Magnetic data collected in the late 1960s has been brought back to life by a research team including a Keele scientist, who have used it to learn more about how the continent of Africa is stretching and splitting apart.
Earth Sciences
Nov 20, 2025
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58
Where did the moon's magnetism go? Scientists have puzzled over this question for decades, ever since orbiting spacecraft picked up signs of a high magnetic field in lunar surface rocks. The moon itself has no inherent magnetism ...
Planetary Sciences
May 23, 2025
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232
Like Earth, Mars once had a strong magnetic field that shielded its thick atmosphere from the solar wind. But now only the magnetic imprint remains. What's long baffled scientists, though, is why this imprint appears most ...
Planetary Sciences
Apr 15, 2025
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120
A large team of researchers with varied backgrounds at the Chinese Academy of Sciences has found evidence of a weak magnetic field on the moon approximately 2 billion years ago. In their study published in the journal Science ...
The evolution of the lunar dynamo is crucial for understanding the moon's deep interior structure, thermal history, and surface environment. A study by Chinese scientists conducted paleomagnetic analyses on basalts returned ...
Planetary Sciences
Dec 20, 2024
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