LUNAR MAGNETIC FIELD
There is no general lunar magnetic field as large as approximately one-ten-thousandth that of the earth, which seems to indicate that the moon does not now have the molten iron-nickel core comparable to that of the earth believed necessary to produce a magnetic field. But evidence suggests that the moon may have had a stronger magnetic field early in its history. Random magnetic fields up to about 0.6 percent of the earth's field intensity were detected at different sites by the Apollo astronauts, but we do not know the reason for such magnetic anomalies.
