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Figure 10 | Journal of Applied Volcanology

Figure 10

From: An analysis of the issuance of volcanic alert levels during volcanic crises

Figure 10

Change in VAL issuance in episodes that ended with eruption and those of `UwE’ over time. Percentages of VALs issued are normalized by the number of volcanoes included in the study year to year. Percentages of data are classified as Categories 1 – 5 following the color code of Figure 2. Blue line is the % of `UwE’ and the Black line is the 3 year running average of the `Timely’ and `Almost’ categories.

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