Fig. 2From: Probabilistic Volcanic Ash Hazard Analysis (PVAHA) I: development of the VAPAH tool for emulating multi-scale volcanic ash fall analysisSchematic representation of the modified PSHA procedure for Probabilistic Volcanic Ash Hazard Assessment (PVAHA); 1. Sources; 2. Magnitude-frequency relationships; 3. Ash load attenuation with distance and; 4. Probability of exceedanceBack to article page