The formation of electric potential over lunar magnetized regions isessential for understanding fundamental lunar science, for understanding thelunar environment, and for planning human exploration on the Moon. A largepositive electric potential was predicted and detected from single pointmeasurements. Here, we demonstrate a remote imaging technique of electricpotential mapping at the lunar surface, making use of a new concept involvinghydrogen neutral atoms derived from solar wind. We apply the technique to alunar magnetized region using an existing dataset of the neutral atom energyspectrometer SARA/CENA on Chandrayaan-1. Electrostatic potential larger than+135 V inside the Gerasimovic anomaly is confirmed. This structure is foundspreading all over the magnetized region. The widely spread electric potentialcan influence the local plasma and dust environment near the magnetic anomaly.
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