苏黎世联邦理工学院的研究人员通过整合重力和磁场测量数据，在月球背面Dewar区域发现了强有力的证据，表明月球在42亿年前曾拥有强大的磁场。1根据这项研究，月球当时的磁场强度大于10微特斯拉，相当于地球现今磁场强度（约50微特斯拉）的五分之一到三分之一。1
研究人员利用美国NASA的GRAIL探针重力测量数据与月球探测器、日本Kaguya探测器的磁场轨道测量数据，确定了Dewar区域地下约60公里宽、9公里深的火成岩体为埋藏的火山岩浆体。1通过分析，研究者排除了剧烈撞击可能导致该磁场的假设，从而支持月球内核曾存在长期动力发电机的理论。1这一发现解决了关于月球是否曾拥有磁场的长期争议，并为理解月球的磁演历以及未来月球任务提供了新的视角。1相关论文已于2026年发表在《Science Advances》期刊上。1
Researchers from ETH Zurich have uncovered evidence that the Moon possessed a strong magnetic field approximately 4.2 billion years ago, with a strength exceeding 10 microtesla—equivalent to one-fifth to one-third of Earth's present-day magnetic field of roughly 50 microtesla.1 The findings, based on a combination of gravity and magnetic field measurements, resolve a long-standing question about whether the Moon ever generated its own magnetic field through an internal dynamo.
The study focused on the Dewar region on the lunar far side, where researchers identified a buried igneous body approximately 60 kilometers wide and 9 kilometers deep beneath the surface.1 Using gravity data from NASA's GRAIL probe and magnetic field measurements from lunar orbiters and Japan's Kaguya spacecraft, the team analyzed the subsurface geology and magnetization patterns of this region.1 The analysis ruled out intense impact events as a cause of the detected magnetic field, instead supporting the theory of a long-lived internal dynamo powering the Moon's ancient magnetism.1 The research, published in Science Advances in 2026, provides new insights into the Moon's magnetic evolution and may inform future lunar exploration missions.1
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