Earthquake early warning (EEW) can be used to detect earthquakes and provide advanced notification of strong shaking, allowing pre-emptive actions to be taken that not only benefit infrastructure but reduce injuries and fatalities. Currently Aotearoa New Zealand does not have a nationwide EEW system, so a survey of the public was undertaken to understand whether EEW was considered useful and acceptable by the public, as well as perceptions of how and when such warnings should be communicated, before making an investment in such technology. We surveyed the public’s perspectives (N = 3084) on the usefulness of EEW, preferred system attributes, and what people anticipated doing on receipt of a warning. We found strong support for EEW, for the purposes of being able to undertake actions to protect oneself and others (e.g. family, friends, and pets), and to mentally prepare for shaking. In terms of system attributes, respondents expressed a desire for being warned at a threshold of shaking intensity MM5–6. They suggested a preference for receiving a warning via mobile phone, supported by other channels. In addition to being warned about impending shaking, respondents wanted to receive messages that alerted them to other attributes of the earthquake (including the possibility of additional hazards such as tsunami), and what actions to take. People’s anticipated actions on receipt of a warning varied depending on the time available from the warning to arrival of shaking. People were more likely to undertake quicker and easier actions for shorter timeframes of <10 s (e.g., stop, mentally prepare, take protective action), and more likely to move to a nearby safe area, help others, look for more information, or take safety actions as timeframes increased. Given the public endorsement for EEW, information from this survey can be used to guide future development in Aotearoa New Zealand and internationally with respect to system attributes, sources, channels and messages, in ways that promote effective action.

Social norms have been successfully applied in health promotion and environmental conservation, but their potential for encouraging natural hazard preparation is relatively untested. This research extends the focus theory of normative conduct to natural hazards and cognitive-behavioral outcomes by examining whether focusing individuals on descriptive and injunctive norms increases their support for earthquake-strengthening legislation in a seismically active city: Wellington, New Zealand. In a large community sample ( N = 690), the injunctive norm condition increased support for the legislation compared with the control, whereas the descriptive norm condition did not. In contrast, the descriptive norm condition raised judgments of the feasibility of the strengthening work compared with the control, whereas the injunctive norm condition did not. These findings support previous research demonstrating the differing effects of descriptive and injunctive forms of normative information, and suggest that using both in the same communication is the best strategy for enhancing support for earthquake-strengthening legislation.

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Purpose -The purpose of this paper is to understand how framing messages about earthquake risk affect judgements about legislation requiring the strengthening of earthquake-prone buildings. Design/methodology/approach -Scenarios described the legislation with a general population sample (n ¼ 271). Two types of framing effects were examined in a 2 (valence frame: positive or negative or positive) by 2 (numerical format frame: frequency/number or percentage) experimental design. Findings -Scenarios reporting the number of earthquake-prone buildings (negative frequency format) increased support for the earthquake-strengthening legislation more than the same message framed positively (frequency number of resilient building) or as a percentage. Demographic variables such as previous earthquake experience and gender interacted with the framing effects, and other variables also predicted support for the legislation were identified. Research limitations/implications -These results have direct implications for the use of framing effects messages in communications about earthquake risk and the wider domain. Originality/value -This is the first study to show that the way the risk is framed affects citizens' judgement of the value of earthquake legislation.