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Illustration of the dynamo mechanism that generates the Earth's magnetic field: convection currents of fluid metal in the Earth's outer core, driven by heat flow from the inner core, organized into rolls by the Coriolis force, generate circulating electric currents, which supports the magnetic field. Credit: Andrew Z. Colvin/wikipedia

Geodynamo Theory: How Earth’s Core Creates the Magnetic Field

The South Atlantic Anomaly — a growing weak spot in Earth’s magnetic shield — has expanded by nearly half the size of continental Europe since 2014, with especially intense weakening now occurring near Africa. At the same time, magnetic strength is rising over Siberia and fading over Canada, reflecting powerful changes unfolding deep inside Earth’s core. Credit: ESA (Data source: Finlay, C.C. et al., 2025)

A giant weak spot in Earth’s magnetic field is now half...

A diagram showing seismic waves traveling through Earth where the newly discovered doughnut-shaped region was detected. Image: Xiaolong Ma and Hrvoje Tkalčić/ANU

Doughnut-shaped region found inside Earth’s core deepens understanding of planet’s magnetic...

Brick dates to the reign of Nebuchadnezzar II (ca. 604 to 562 BCE) based on the interpretation of the inscription. This object was looted from its original context before being acquired by the Slemani Museum and stored in that museum with agreement from the central government. Image courtesy of the Slemani Museum

Mesopotamian bricks unveil the strength of Earth’s ancient magnetic field

Earth

Activity deep in Earth affects the global magnetic field

New study reveals, how foreshock waves interact with Earth’s magnetosphere. Foreshock waves are able to tune the shock, making it alternatively stronger or weaker. These waves could only be detected in a narrow region behind the shock. (Image: Lucile Turc)

New study models the transmission of foreshock waves towards Earth

Structure layers of the earth.

How magnetism could help explain Earth’s formation

Rock samples collected near the Antarctic volcano Mount Erebus, seen here in the distance, harbor fingerprints of Earth’s ancient magnetic field. A new analysis delves into discrepancies between these fingerprints and predictions from a long-standing approximation of the field. Credit: Hanna Asefaw

Antarctic Lava Yields Clues to Earth’s Past Magnetic Field

Map of the Earth showing the present-day deviation from expected magnetic field direction. The star is Saint Helena

South Atlantic anomalies existed 8 – 11 million years ago

Earth magnetic field. Credit: Carnegie Institution for Science

How does Earth sustain its magnetic field?

Earth’s geomagnetic field

Earth’s magnetic field can change 10 times faster than previously thought

Next to Prof. Oded Aharonson is the tri-axial Helmholtz Coil used to generate the magnetic field during the growing of the ice samples

The magnetic history of ice

This visualization shows the magnetic field around Earth, or the magnetosphere. Earth’s magnetic field origins are still a mystery, a new MIT study finds. Credit: Greg Shirah and Tom Bridgman, NASA/Goddard Space Flight Center Scientific Visualization Studio.

Origins of Earth’s magnetic field remain a mystery

Photomicrographs showing anorthosites with 'correct' and 'wrong' proportions of chromite from the Bushveld Complex, South Africa. Credit: Wits University

Researchers unravel the mystery of non-cotectic magmatic rocks

Earth

Earth’s Mantle, Not Its Core, May Have Generated Planet’s Early Magnetic...

Study co-author Rob Coe and Trevor Duarte orienting cores from a lava flow site recording the Matuyama-Brunhes magnetic polarity reversal in Haleakala National Park, Hawaii, in 2015

Earth’s last magnetic field reversal took far longer than once thought

Earth inside

New findings on Earth’s magnetic field

Visualization of the interior of the Earth's core

Geomagnetic jerks finally reproduced and explained

Map of the locations and depths of the deep low-frequency (DLF) earthquakes beneath the Laacher See Volcano ("Lake Laach Volcano") in Germany. Brittle earthquakes are marked as circles, DLF events as stars. Credit: Hensch et al.

Deep low-frequency earthquakes indicate migration of magmatic fluids beneath Laacher See...

The complex history of Earth’s magnetic reversals

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