Volcanic hazard perceptions: comparative shifts in knowledge and risk

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Abstract
Residents of two North Island, New Zealand, communities were surveyed in March 1995 to measure their understanding of volcanic hazards. This was repeated in November 1995, following the Ruapehu eruptions of September‐October 1995. Both communities were subjected to intense media coverage during the 1995 Ruapehu eruption. Whakatane was spared any direct effects, whereas Hastings experienced the hazard directly, in the form of ash falls. Only Hastings’ respondents showed a significant change in threat knowledge and perceived volcanic risk. While experiencing the direct and indirect impacts of the 1995 Ruapehu eruption may make subsequent warnings and information releases more salient, thereby enhancing the likelihood of engaging in successful protective actions or other forms of response, the characteristics of hazard impacts may increase susceptibility to a “normalisation bias”, reducing future community preparedness.