Eruptions, Earthquakes, and Emissions

Animated map of earthquakes, volcanic eruptions, and sulfur dioxide emissions

Smithsonian Institution National Museum of Natural History
View the map
Points can be viewed on either an interactive globe or flat map
Probing points provides access to more details and data
The application offers direct data downloads

“Eruptions, Earthquakes, & Emissions” (or “E3”), built for the Smithsonian Institution’s National Museum of Natural History, is a time-lapse animation of volcanic eruptions and earthquakes since 1960. It also shows volcanic gas emissions (sulfur dioxide, SO2) since 1978 — the first year satellites were available to provide global monitoring of SO2. Eruption and gas emission data are drawn from the Volcanoes of the World database maintained by the Smithsonian’s Global Volcanism Program (GVP). Earthquake data are from the United States Geological Survey (USGS) Earthquake Catalog.

Upon entry to the interactive map, which can be viewed either as a flat map or 3D globe, animation begins from 1960, with earthquakes, eruptions, and emissions appearing as points—sized according to magintude—when they occurred, then gradually fading away. All points are interactive, and can be inspected to learn more about the event or to visit external pages with even more details and data. Emission events additionally offer their own animations, which show the spread of the SO2 cloud over a period of days. Alternatively, the map has an “all events” snapshot mode in which all points from tbe entire time span are visible at once. In either mode, the “ring of fire” and other features of the Earth’s active tectonic geography become apparent.

A key technical challenge in this map was the smooth, fast display and animation of hundreds of thousands of points. To that end, we built using the Cesium JavaScript library, which leverages WebGL technology and includes a 3D globe mode. This was far more efficient at rendering so many objects on screen than typical canvas or SVG elements, allowing us to create an animated map that is both dazzling and richly interactive.

Built with and for:

Smithsonian Institution National Museum of Natural History
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