Second of a series of four photos showing a slab avalanche triggered by a skier. Austria. No date.

Second of a series of four photos (gesu0440, gesu0441, gesu0442, gesu0443) showing a slab avalanche triggered by a skier. Skier is farther down slope, cracks and fractures in snow very visible. Photo by Ludwig, courtesy of U.S. Forest Service. (Some scratches on negative.) Austria. No date. Published in U.S. Department of Agriculture Forest Service Agriculture Handbook 489. Figure 86 July 1976.