In this image of Peru's Sabancaya stratovolcano, acquired May 13, 2020, the years-long eruption continues. In the top image, Sabancaya has a bright white cloud in its caldera. The greyish cloud to the east is an ash plume. The Ampato volcano, with its prominent summit caldera, is to the south. The red areas are vegetation. The lower thermal infrared composite image shows the plume in purple, indicating that it is dominantly composed of ash and water vapor. A bright hotspot can be seen in the summit caldera of Sabancaya. The images cover an area of 13.5 by 24 kilometers, and are located at 15.8 degrees south, 71.9 degrees west.

With its 14 spectral bands from the visible to the thermal infrared wavelength region and its high spatial resolution of about 50 to 300 feet (15 to 90 meters), ASTER images Earth to map and monitor the changing surface of our planet. ASTER is one of five Earth-observing instruments launched Dec. 18, 1999, on Terra. The instrument was built by Japan's Ministry of Economy, Trade and Industry. A joint U.S./Japan science team is responsible for validation and calibration of the instrument and data products.

The broad spectral coverage and high spectral resolution of ASTER provides scientists in numerous disciplines with critical information for surface mapping and monitoring of dynamic conditions and temporal change. Example applications are monitoring glacial advances and retreats; monitoring potentially active volcanoes; identifying crop stress; determining cloud morphology and physical properties; wetlands evaluation; thermal pollution monitoring; coral reef degradation; surface temperature mapping of soils and geology; and measuring surface heat balance.

The U.S. science team is located at NASA's Jet Propulsion Laboratory in Pasadena, Calif. The Terra mission is part of NASA's Science Mission Directorate, Washington.

More information about ASTER is available at http://asterweb.jpl.nasa.gov/.