  We use in-situ data from the Wind spacecraft to survey the amplitude of
turbulent fluctuations in the proton density and total magnetic field inside a
large sample of near-Earth magnetic clouds (MCs) associated with coronal mass
ejections (CMEs) from the Sun. We find that the most probable value of the
modulation index for proton density fluctuations ($\delta n_{p}/n_{p}$) inside
MCs ranges from 0.13 to 0.16, while the most probable values for the modulation
index of the total magnetic field fluctuations ($\delta B/B$) range from 0.04
to 0.05. We also find that the most probable value of the Mach number
fluctuations ($\delta M$) inside MCs is $\approx 0.1$. The anomalous
resistivity inside near-Earth MCs arising from electron scattering due to
turbulent magnetic field fluctuations exceeds the (commonly used) Spitzer
resistivity by a factor of $\approx 500-1000$. The enhanced Joule heating
arising from this anomalous resistivity could impact our understanding of the
energetics of CME propagation.
