Thermal anomaly map of Yellowstone National Park based on a Landsat 8 nighttime thermal infrared image from 9 January 2021

Thermal anomaly map of Yellowstone National Park, based on a Landsat 8 nighttime thermal infrared image from 9 January 2021.  The color ramp indicates the intensity of the above-background thermal anomaly for each thermal area.  Lakes are blue.  Yellowstone caldera and resurgent domes are outlined in black.  Thermal areas in the inset images are annotated with geothermal radiant emittance values in Watts per square meter (W/m²), and geothermal radiant power output values in megawatts (MW; 1 megawatt is 1 million watts).