3.4. Distribution of Bran, and strength
Ohno & Shibata (1993) have studied the random component of the galactic magnetic field, using pairs of pulsar RM seen in almost the same directions in the sky. They found that Bran 5 µGauss, within cell sizes 50 pc.
Equipartition has occured, and the total magnetic energy density in the interstellar medium is now roughly equal to the energy densities found in other components of the interstellar medium (interstellar turbulence; cosmic rays; thermal pressure of a hot medium).