Volcanic eruptions Risk is not based on climate projections, but on a static geographical analysis assessing threat posed by active volcanoes nearby. Volcanic eruption data used comes from the Smithsonian Institution Global Volcanism Program.
The calculation is based on two fundamental variables:
Our methodology for Volcanic Risk assessment reflects standard principles of Volcanic Hazard Assessment. It is based on use of authoritative global databases, a standardized magnitude index, and distance-based risk classification logic that is consistent with volcanic phenomena physics.
The Volcanic Explosivity Index (VEI) is the standard scale used worldwide to measure magnitude of an explosive eruption.
Our risk matrix, which combines VEI and distance, is scientifically founded because different volcanic phenomena have a typical action radius that depends precisely on eruption magnitude.
In summary, our methodology uses the world reference database (GVP), is based on the standard magnitude index (VEI) and applies a distance-based risk zoning logic that is fully coherent with scientific understanding of the range of different and dangerous volcanic phenomena.
Our methodology for Volcanic Risk assessment reflects standard principles of Volcanic Hazard Assessment. It is based on use of authoritative global databases, a standardized magnitude index, and distance-based risk classification logic that is consistent with volcanic phenomena physics.
• [Smithsonian Institution Global Volcanism Program](Smithsonian Institution Global Volcanism Program)
GVP is the world reference institution for documenting volcanic activity. Its database catalogs all Earth's volcanoes that have erupted during the Holocene (last 10,000 years), providing crucial data on:
The Volcanic Explosivity Index (VEI) is the standard scale used worldwide to measure magnitude of an explosive eruption.
• [The volcanic explosivity index (VEI) an estimate of explosive magnitude for historical volcanism](The volcanic explosivity index (VEI) an estimate of explosive magnitude for historical volcanism)
This article introduced and defined the VEI scale. The scale is logarithmic and primarily based on volume of tephra (ash and pyroclastic material) emitted and eruptive column height. It is the fundamental tool that allows comparing magnitude of different eruptions and, consequently, estimating a volcano's potential impact. Our methodology is based on this index to quantify a volcano's historical 'power'.
Our risk matrix, which combines VEI and distance, is scientifically founded because different volcanic phenomena have a typical action radius that depends precisely on eruption magnitude.
• Volcanoes
This scientific literature defines different hazard zones around a volcano, which correspond perfectly to our risk levels:
In summary, our methodology uses the world reference database (GVP), is based on the standard magnitude index (VEI) and applies a distance-based risk zoning logic that is fully coherent with scientific understanding of the range of different and dangerous volcanic phenomena.