  The nonlinear evolution of unstable C-type shocks in weakly ionized plasmas
is studied by means of time-dependent magnetohydrodynamical simulations. This
study is limited to shocks in magnetically dominated plasmas (in which the
Alfven speed in the neutrals greatly exceeds the sound speed), and
microphysical processes such as ionization and recombination are not followed.
Both two-dimensional simulations of planar perpendicular and oblique C-type
shocks, and fully three-dimensional simulation of a perpendicular shock are
presented.
