Maps

  Tsunami & Volcano Risk Lens

  This interactive globe spotlights tsunami events with suspected volcanic triggers alongside the volcanoes most often linked

  to them. Use it to explore where tsunami runups cluster, how frequently individual vents have caused trouble, and how

  recent eruptions line up with tsunami history.

  How to Navigate

  - Pan and zoom just like any web map; click and drag to rotate the globe.

  - Toggle layers (top-left):

      - Heat map shows the density of tsunami events.

      - Event markers drop a pin for every volcanic tsunami in the NOAA record (mouse over or tap to open the info card).

      - Volcano clusters highlight the highest-risk volcanoes; click a marker to see eruption status, number of associated

        events, max runup, and median tsunami distance.

  - Use your mouse or trackpad scroll to zoom in for detail, out for regional context.

  Reading the Layers

  - Heat map colors (right-hand legend) run from cool to warm tones—brighter cells mark higher concentrations of tsunami

    runups, scaled in log space so both hotspots and isolated events remain visible.

  - Event markers (orange circles) provide event-level detail: date, location, recorded deaths/damage, and the nearest

    catalogued volcano. The “Heat weight” field is the value feeding the heat map (log-scaled total deaths in the current

    configuration).

  - Volcano markers (purple chevrons) flag volcanoes with the most nearby tsunamis. Popups include eruption recency (using

    Smithsonian GVP codes), number of tsunamis within 120 km, and the highest recorded runup.

  Data Sources

  - NOAA / National Centers for Environmental Information – Global Historical Tsunami Database (October 2025 export).

  - Smithsonian Global Volcanism Program – volcano coordinates and eruption status metadata (October 2025).

Updated on Oct 30th, 2025.