Fig. 3
From: A physics-based source model for real-time tephra-dispersal forecasting for weak eruption plumes
Results of the plume shape for Runs 1-4. Upper row (a,c,e,g); center lines of the eruption column (red line) and the NBL (blue line). The downwind gravity current intrudes at the NBL. Lower row (b,d,f,h); the width (red line) and thickness (blue line) of the downwind gravity current