There are ways to seek out avalanches. One way is to use radar to see if there is any unstable snow around public areas. Another way is to keep an eye on places likely to have avalanches and to prevent them. A third way is to be aware of mountain weather when skiers come, if there are conditions of weather suitable for an avalanche.
Avalanches can be prevented in many ways. One way to prevent avalanches is to detonate areas of snow before they get too unstable. Another way is to replant trees to create a barrier. Sometimes there is no real way to stop an avalanche, so mountain patrol workers warn people of danger with signs and warnings.
Experts usually know when an avalanche is going to strike. They study the terrain. They know the weather and conditions. They know the speed avalanches will fall, and know roughly when they will as well.