Answer: This device is called Gazex and it’s used to start avalanches, so they can control when and where they happen. This avalanche control system uses specially constructedand “exploder” sites and tubes built at key locations in avalanche territory to set off avalanches at controlled times. The exploders literally detonate a mixture of oxygen and propane from the tube structures. The explosive force expelled from the tubes triggers avalanches. The explosive bursts are fueled by gas canisters stored in tanks beneath the exploders on the mountain.