JOURNAL ARTICLE

Satellites detected a strange signal coming from deep within the Earth 20 years ago.

  • Published In: How It Works, 2025, n. 209. P. 20 1 of 3

  • Database: Science Reference Ultimate 2 of 3

  • Authored By: PESTER, PATRICK 3 of 3

Abstract

The article discusses the discovery of a significant gravitational anomaly detected by GRACE (Gravity Recovery and Climate Experiment) satellites off the coast of Africa nearly 20 years ago, which lasted for about two years. This anomaly coincided with a geomagnetic 'jerk,' suggesting a previously unknown geological process may have caused a rapid redistribution of mass in the Earth's deep mantle, potentially altering the magnetic field. Researchers believe this mass shift was linked to a transformation in the structure of magnesium silicate under pressure. The study emphasizes the complexity of Earth's internal processes and the need for diverse datasets and methods to enhance understanding of its deep interior. [Extracted from the article]

Additional Information

  • Source:How It Works. 2025/12, Issue 209, p20
  • Document Type:Article
  • Subject Area:Earth and Atmospheric Sciences
  • Publication Date:2025
  • ISSN:2041-7322
  • Accession Number:189097160
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