Volcanoes

Volcanoes on TerraPulse are organized into the vol Eventdex — one slot per volcanic event, each a measured record of an eruption or unrest episode that actually happened, catalogued by the Smithsonian and the U.S. Geological Survey. No estimates, no forecasts.

The dexes

The record lives in a single Eventdex. Counts are live and grow as new eruptions and unrest episodes are catalogued:

That is about 11,000 measured volcanic events, spanning the historical eruption record and updating as new activity is reported.

Provenance

Every event traces to the Smithsonian Global Volcanism Program, the definitive global catalogue of Holocene and Pleistocene volcanism, and the USGS Volcano Hazards Program, which monitors U.S. volcanoes in real time. Both sources are registered against the dex, so any record on TerraPulse carries a direct line back to its originating observation.

What's in a record

Each event slot carries:

• Volcano — name and identifier in the global catalogue
• Location — latitude, longitude, and summit elevation
• Event type — eruption, unrest, or confirmed activity
• Timing — start and, where known, end dates of the episode
• VEI — Volcanic Explosivity Index, where an eruptive magnitude is assigned
• Region — the volcanic arc or province