These animations were assembled in partnership with the USGS Volcano Hazards Program, the Forest Service, and the Mount St. Helens Institute. Each short animation illustrates how scientists observe the volcano for signs of rising magma.
Volcano Deformation (duration 0:54 minutes) – USGS geologist, Dan Dzurisin, describes techniques used to measure ground movement at volcanoes.
Volcano Gas Monitoring (duration 1:21 minutes) – USGS geologist, Cindy Werner, describes techniques used to measure volcanic gases at volcanoes.
Volcano Seismic Monitoring (duration 1:04 minutes) – This video describes techniques used to measure seismic activity, which cause earthquakes, at volcanoes.