  We study the particles emitted in the fireball following a Relativistic Heavy
Ion Collision with the traditional angular analysis employed in cosmology and
earth sciences, producing Mollweide plots of the p_t distribution of a few
actual, publically released ALICE-collaboration events and calculating their
angular power spectrum. With the limited statistics at hand, we do not find
evidence for acoustic peaks but a decrease of C_l that is reminiscent of
viscous attenuation, but subject to a strong effect from the rapidity
acceptance which probably dominates (so we also subtract the m=0 component). As
an exercise, we still extract a characteristic Silk damping length
(proportional to the square root of the viscosity over entropy density ratio).
The absence of acoustic-like peaks is also compatible with a crossover from the
QGP to the hadron gas (because a surface tension at domain boundaries would
effect a restoring force that could have driven acoustic oscillations).
Presently an unexpected depression appears in the l=6 multipole strength, which
should be revisited by the ALICE collaboration with full statistics to confirm
or discard it.
