Here are presented the results we got for a simulation of 40s.
  The following pictures show the velocity fields for several moments of the simulation : 1, 10, 14, 20, 30 and 40s.
We can see that the velocity is about 8m/s which is a good order of value for this type of avalanches (between 5 and 20m/s) and the way it propagates is good.