Hot Mantle Blobs May Shape Earth's Magnetic Field
TL;DR
Seismic data and geodynamo simulations indicate two hot “Blob” regions at the core–mantle boundary heat the surrounding mantle less evenly, insulating the outer core and shaping long-lived, longitudinal magnetic-field patterns, helping explain Earth's magnetic stability over hundreds of millions of years.
- Signs of Mysterious Structures Near The Core Detected in Earth's Magnetic Field ScienceAlert
- Two Titanic Structures Hidden Deep Within the Earth Have Altered the Magnetic Field for Millions of Years WIRED
- Mantle heterogeneity influenced Earth’s ancient magnetic field Nature
- Two huge hot blobs of rock influence Earth's magnetic field, study reveals Phys.org
- Enormous Pair of Deep-Earth Hot ‘Blobs’ Shape Earth’s Magnetic Field, Scientists Say Gizmodo
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