Fig. 2From: Phreatic eruptions at crater lakes: occurrence statistics and probabilistic hazard forecastCumulative number of phreatic eruptions with time. Since we only considered the phreatic sub-dataset and magmatic eruptions could have occurred in gaps of phreatic activity, we cross-checked for magmatic eruptions in the original catalogue during longer periods of phreatic quiescence. Red vertical lines indicate periods of magmatic episodes during phreatic quiescence; red boxes indicate major magmatic episodes as identified by Scott (2013). Labelled grey boxes at the top indicate periods 1–4 with different explosion frequencies as discussed in the textBack to article page