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Lunar Magnetism Mystery "Still Unexplained" as Material Detected on Far Side of the Moon Stumps Scientists

  • MIT researchers published a study explaining highly magnetic rocks on the Moon's far side linked to a massive asteroid impact billions of years ago.
  • The impact, occurring about 3.7 to 3.9 billion years ago, generated a plasma cloud and seismic shockwave that amplified a weak ancient magnetic field on the Moon.
  • Simulations show the plasma compressed magnetic field lines, boosting the field strength from around 1–2 microteslas to over 40 microteslas for about 40 minutes near the lunar south pole.
  • Lead author Isaac Narrett described the magnetization process by comparing it to tossing a set of cards, each equipped with a compass needle, into a magnetic environment, illustrating how the magnetic orientation of the rocks was reset during the brief event.
  • This hypothesis offers a testable explanation for lunar magnetism and suggests impact-generated plasma amplification may explain similar magnetic anomalies on other planetary bodies.
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New England Center for Investigative Reporting… broke the news in on Sunday, May 25, 2025.
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