Figure 8
From: An analysis of the issuance of volcanic alert levels during volcanic crises
Effect of Population on VALs. A) Distribution of VALs issued for all volcanoes in the study compared to the population living within 30 km of the volcano. B) Data for Country A – high average population within 30 km. C) Data for Country B – low average population within 30 km. All percentages are normalized by the number of volcanoes in each bin. Percentages of data are classified as Categories 1 – 5 following the color code of Figure 2. Pie charts show UwE (Category 6) as a % of all alerts except `Missed’.