On Dec. 22, 2018, Indonesia's Anak Krakatau volcano erupted and partially collapsed. NASA's Advanced Spaceborne Thermal Emission and Reflection (ASTER) instrument imaged the volcano on Jan. 13 -- several weeks after the eruption. This image shows that the crater area has closed to become a lake and the forest on the island has been destroyed by ash falls. The reddish area in the water southwest of the island is likely due to either iron-rich ash in the water or the interaction of seawater with underwater volcanic eruption products. The image covers an area of 7.5 by 8.4 miles (12.2 by 13.5 kilometers), and is located at 6.1 degrees south, 105.4 degrees east. The tsunami that followed the eruption killed more than 400 people in western Indonesia. https://photojournal.jpl.nasa.gov/catalog/PIA22821