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
1 h
6 min
36 s
10− 6
3.6 s