an example of an Event Tree for Katla volcano 
is presented to address the importance of a long-term hazard assessment based on the back-
ground knowledge of a volcano. 
1.2 
Type of results 
A common and well-established way to represent volcanic hazards is through maps (Calder et 
al., 
2015; Loughlin, Vye-Brown, et al., 
2015; Pallister et al., 2019). A map can visualize the 
spatial extent
        
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