A giant weak spot in Earth’s magnetic field is now half the size of Europe

A giant weak spot in Earth’s magnetic field is now half the size of Europe Earth’s magnetic field is on the move — and one giant weak spot over the Atlantic is getting dramatically bigger.

• Date:
• February 25, 2026
• Source:
• European Space Agency (ESA)
• Summary:
• Earth’s magnetic shield is shifting in dramatic ways. New data from ESA’s Swarm satellites show that the South Atlantic Anomaly — a vast weak spot in Earth’s magnetic field — has grown by nearly half the size of continental...