This website, provided by the University of Alaska and Geophysical Institute, explains the Puff-A Volcanic Ash Tracking Model project, which uses representative ash particles from volcanoes to study the advection and diffusion of ash within the atmosphere. After learning about the history of the project, visitors can find animations and images of the model's predictions for various volcanoes as well as the technical documentation. The website offers downloads of the latest version of the model, information on Puff's sensitivity, and satellite imagery of past volcanic eruptions.