Figure 6

A time series of eruptions per century from 50 ka to 1 ka, shown in comparison to number of expected events. The recorded number of (a) M4-4.9, (b) M5-5.9, (c) M6-6.9 eruptions (blue line) in 100 year bins, and the (*)expected eruptions if volcanic activity is stationary and fully recorded (black line), based on activity from 1900 to 2013. Levels indicative of 50% and 10% of expected eruptions are shown.