We study the distribution of the color fields due to a static quark-an
tiquark pair in SU(2) lattice gauge theory. We find that the London pe
netration length measured after Abelian projection in the Abelian Cova
riant gauge (Maximal Abelian gauge) agrees with the one obtained witho
ut gauge fixing. We put out a simple relation between the penetration
length and the string tension.