The barren slopes of Von Seebach cone at the upper right are a result not of its frequent eruptions, but of tephra and acidic gases blown downwind from the lake-filled Active Crater (left). Steady trade winds from the NNE distribute acidic vapors rising from Active Crater to the SW, creating the "Dead Zone" that extends down the SW flanks visible at the extreme upper right.

Photo by Eliecer Duarte (OVSICORI-UNA).

Rincón de la Vieja