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Expert opinion and probabilistic volcanic risk assessment

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  • Amy Donovan
  • J. Richard Eiser
  • R. Stephen J. Sparks

Abstract

We present data from an international survey of scientists working at volcanic observatories concerning eruption likelihoods. The scientists were asked a range of questions using different types of phrasing. The data suggest that the phrasing of questions affects the ways in which probabilities are estimated. In total, 71% of respondents (N = 70) exhibited some form of inconsistency in their answers between and/or within different question formats. The data also allow for an analysis of the use of scaling in probabilistic assessment, and the use of quantitative versus verbal risk measurements. However, some respondents were uncomfortable with providing any numerical probability estimate, perhaps suggesting that they considered the uncertainty too high for meaningful judgements to be made.

Suggested Citation

  • Amy Donovan & J. Richard Eiser & R. Stephen J. Sparks, 2017. "Expert opinion and probabilistic volcanic risk assessment," Journal of Risk Research, Taylor & Francis Journals, vol. 20(6), pages 693-710, June.
    • Handle: RePEc:taf:jriskr:v:20:y:2017:i:6:p:693-710
    DOI: 10.1080/13669877.2015.1115425
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