Fig. 17

Schematic illustrations of different uncertainty visualization methods, including a fuzzy boundaries or gradational colors attempt to show uncertainty at outer zone limits or between zones; b boundaries of different certainty levels are depicted using different symbology (e.g., dashed or solid lines); c a buffer zone depicting uncertainty is placed around the hazard zone; d confidence limits, like the 10 and 90% confidence limits shown here, are placed around a hazard zone or shown in different map panels; e different versions of the hazard zones are shown on different map insets to show uncertainty, often as the uncertainty is expected to evolve through time (e.g., multiple sizes of a hazard zone around a hypothetical vent location are shown)