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Hydrologic Monitoring in Yellowstone National Park

River-Discharge and Chloride-Concentration Data Analysis of long-term river discharge and chloride concentrations in major rivers in Yellowstone provide a quantitative estimate of the total heat discharge from the Yellowstone volcanic system and can also be examined for temporal trends associated with magmatic and tectonic activity.

Hydrologic Data (from the U.S. Geological Survey)

Thermal-Feature Data

Heat and volcanic gases rise from the Yellowstone magma chamber and warm the salty water that occupies fractured rocks above the Yellowstone magma chamber. That brine, in turn, transfers its heat to overlying fresh groundwater, which is recharged by rainfall and snowmelt from the surface. This superheated water can flash to steam, propelling both steam and hot water to the surface as a geyser. Steamboat, located in Norris Geyser Basin, is one of Yellowstone's most famous geysers. Yellowstone Park staff recently began monitoring the outlet channel of Steamboat Geyser.