The International Volcanic Health Hazard Network (IVHHN) is an organization that provides research and information on volcanic health hazards. Members of the group work in a range of research areas including volcanology, toxicology, and public health with the goal of determining the health effects of volcanic ash emissions.
The main aim of the organization is to produce and distribute volcanic health hazard information to scientists, governments, emergency managers, and the public. They have also created pamphlets on preparing for ashfall and the health hazards of ash for the general public, which can be distributed at the onset of new eruptions.
The network is part of the International Association of Volcanology and Chemistry of the Earth's Interior (IAVCEI).