Figure 4
From: Recognizing and tracking volcanic hazards related to non-magmatic unrest: a review
View of the Ruapehu summit area after the September 2007 “surprise” phreatomagmatic eruption. The yellow arrow indicates the tephra fall; the open white arrow indicates the proximal deposit of the lahar, that was generated after partial crater lake expulsion due to the phreatomagmatic eruption (filled white arrow) (Picture by Karoly Németh).