  We study properties of space-like monopole trajectories in the Maximal
Abelian gauge of quenched SU(2) QCD at the finite temperature. We concentrate
on infrared monopole clusters which are responsible for the confinement
properties of the theory. We determine numerically the effective action of the
monopoles projected onto the three-dimensional time-slice. Then we derive the
length distributions of the monopole loops and fix their entropy.
