We study numerically the asymptotics of size distributions for avalanc
he waves in the 2D Abelian sandpile model. We find the estimates of ex
ponents for five families of waves, including the first and the last w
aves in an avalanche. The size distributions of waves of a general for
m and boundary avalanches are also investigated. The obtained results
are in agreement with theoretical predictions and numerical simulation
s performed by other authors.