  We present and analyze epsilon Aurigae data concerning the evolution of the
H$\alpha$ line on the occasion of the 2009 International observation campaign
launched to cover the eclipse of this object. About 250 high resolution spectra
of the H$\alpha$ line were obtained by amateur covering the three years around
eclipse. We visually inspect the dynamical spectrum constructed from the data
and analyze the evolution with time of the radial velocity and of EW
(Equivalent Width) vs V mag. The spectroscopic data reveal many details which
confirm the complexity of the Aurigae system. The object is far from being
understood. In particular, according to our measurements, the eclipse duration
has been underestimated and key dates were defined. A complete analysis of
details revealed by our data would require much time and effort. Observers are
encouraged to continue monitoring the H$\alpha$ line out of eclipse in the hope
that it will provide further important information.
