Mt. Etna, Italy erupted Tuesday, February 16, 2021, sending rivers of lava down the southeast flank of the volcano, and spewing ashes and volcanic stones over nearby villages. Sicily's Catania Airport was temporarily closed due to an ash plume that rose to 3700 m altitude. The ASTER nighttime thermal infrared data shows the extent of the active lava flows, draped over an older Google Earth image. The image was acquired February 17, 2021, covers an area of 38 by 39 km, and is located at 37.8 degrees north, 15 degrees east. https://photojournal.jpl.nasa.gov/catalog/PIA24417