The ISM magnetic field is typically about 0.0001 times as strong as Earth's magnetic field at its surface.

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The ISM magnetic field is generally weaker than Earth's magnetic field. According to a study published in The Astrophysical Journal, the average strength of the ISM magnetic field is estimated to be about 0.1 microgauss, which is about 0.0001 times as strong as Earth's magnetic field at its surface.

The ISM Magnetic Field Is Typically About 0