Figure 3
From: Improvements of volcanic ash fall forecasts issued by the Japan Meteorological Agency
Comparison of ash-fall quantity forecast using MRI method and observed ash-fall quantity. (a) Quantitative tephra-fall predictions (g/m2) from 15:00 JST on January 26 until 00:00 JST on January 28 based on JMA-RATM for the 2011 eruption at Shinmoedake volcano. Initial values for plume height and eruption duration based on data from the JMA weather radar network (Shimbori et al. 2014). Legend: ●, ash fall observed; ○, no ash fall observed. (b) Ash-fall observations (kg/m2) for eruptions at Shinmoedake volcano during January 26–27, 2011 (Furukawa 2011). Colored dots correspond to the color bar at the left side in the figure (b).