Satellite images of Nupahr Lake, Norris Geyser Basin, in 2024

High-resolution satellite images of Norris Geyser Basin showing the area of Porcelain Basin and Nuphar Lake (both images cover the same area).  In the left image, acquired on April 2, 2024, springs on Porcelain Terrace are full of water, and warm hydrothermal water is flowing into Nuphar Lake from the area circled in yellow.  This warm water kept the north part of the lake free of ice, the lake level is high, and the color is a milky blue.  Boardwalks in the area appear as white lineations because they are covered in snow. In the right image, acquired on August 20, 2024, the lake level is lower, and the color is a deep green.  The variations in lake level and color were caused by the cessation of thermal water flowing into the lake from nearby hydrothermal features—a change that was coincident with a hydrothermal explosion in the area on April 15, 2024.  Imagery were processed by R. Greg Vaughan (USGS), and data were collected by WorldView-3 satellite and made available thanks to the NEXTVIEW End User License Agreement between Maxar (formerly DigitalGlobe, Inc.), which supports Earth science research and applications.