Costanza Bonadonna (born 1971) is an Italian earth scientist who is a Full Professor of volcanology and geological risk at the University of Geneva.

[1] When she was at high school Prof. Franco Barberi came to deliver a lecture in which he discussed the science of risk reduction during volcanic eruptions.

[1] She realised that whilst volcanic eruptions can be devastating for communities, they can bring benefits, including fertilisation of soils.

[10] Since 2007, she has served as Director of the Assessment and management of Geological and Climate-Related Risks (CERG-C) programme at the University of Geneva.

[10] She is also active in the linkage between model development and risk assessment and mitigation in the effort of bridging the gap between scientists and non-scientists (e.g. emergency management planners, government officials).