Contact: Bill Steigerwald
NASA/Goddard Space Flight Center
Caption: This illustration shows a permanently shadowed region of the moon undergoing subsurface sparking (the 'lightning bolts'), which ejects vaporized material (the 'clouds') from the surface. Subsurface sparking occurs at a depth of about one millimeter. Image not to scale.
Credit: Andrew Jordan/UNH
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Related news release: Electric sparks may alter evolution of lunar soil