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Table 6 Given annual risk of fatality, equivalent duration at specified hour risk level

From: Evaluating life-safety risk for fieldwork on active volcanoes: the volcano life risk estimator (VoLREst), a volcano observatory’s decision-support tool

Annual risk of fatality

Equivalent duration at hourly risk level

10−3

10−4

10−5

10−1

105 h

1054 h

N/A

10−2

10 h

100 h

1005 h

10−3

1 h

10 h

100 h

10−4

6 min

1 h

10 h

10−5

36 s

6 min

1 h

10− 6

3.6 s

36 s

6 min

  1. N/A indicates that the value is greater than the number of hours in a year