These are photos of ground-based cloud nucleating generators. A propane flame is used to vaporize the seeding solution, which is composed of silver iodide mixed in acetone. The vaporized silver iodide then re-crystallizes in the cold air, forming millions of tiny particles which are intended to serve as ice nuclei. The generators are positioned to maximize the number of silver iodide crystals that reach the critical regions of passing storms.
Back to main photo page