Mercury’s crustal magnetization indicates a stronger ancient dynamo

Proceedings of the National Academy of Sciences, Volume 123, Issue 35, September 2026. <br/>SignificanceMercury’s present-day dynamo-generated magnetic field is anomalously weak. However, Mercury’s 3.9- to 3.7-billion-year-old crustal remanent magnetization suggests that the planet once generated a dynamo magnetic field that was 1 to 2 orders of …



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