Risk communication successes and limits during sismo-volcanic crisis: the example of Mayotte, France

Type Article
Acceptance Date 2021-01 IN PRESS
Language English
Author(s) Devès Maud H.ORCID1, 2, Lacassin RobinORCID1, Pécout Hugues3, Robert Geoffrey1
Affiliation(s) 1 : Université de Paris, Institut de physique du globe de Paris, CNRS UMR 7154, 75005 Paris, France
2 : Université de Paris, Institut Humanités Sciences Sociétés, Centre de Recherche Psychanalyse Médecine et Société, CNRS EA 3522, 75013 Paris, France
3 : Université de Paris, Collège international des sciences territoriales, CNRS FR 2007, 75013 Paris, France
Source Natural Hazards and Earth System Sciences (Copernicus GmbH) In Press
DOI 10.5194/nhess-2021-164
Abstract

On 10 May 2018, an active seismic crisis began on French island of Mayotte, which a year later will be shown to be related to offshore volcanic activity. It affects a vulnerable territory exposed to risks of many kinds (poverty, violence, lack of basic resources). In the absence of known events in human memory, the population is naive with regard to seismic and volcanic hazards. The concern is therefore very strong. In spite of a large number of publications, the communication set up by the main actors of the risk chain does not answer the population's concern. To understand why, we analyse a large corpus of the textual communications (press releases, web pages, scientific bulletins, reports, etc.) issued by the authorities and scientists from May 2018 to April 2021. We draw lessons on the communication strategy put in place in the first three years of the crisis; and we issue recommendations for improvement in the future, in Mayotte, but also elsewhere in contexts where comparable geo-crises may happen. We notably stress the importance of ensuring that communication is not overly technical, that it aims to inform rather than reassure, that it focuses on risk and not only on hazard and that it provides clues to possible risk scenarios.

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