Satellite imagery showing the evolving geomorphology of Anak Krakatau (Indonesia) as a result of the December 2018 through January 2019 eruptive activity and the 22 December 2018 tsunami. (A, B) Island morphology before the flank failure. Image in panel C was captured only 8 hours after the tsunami, and shows the western flank failure and collapse of the summit. (D) The destruction of the summit. (E) The subsequent regrowth of the island. (F) Changes in island surface area through this period. A and F are European Space Agency satellite Sentinel-2A true-color images, and panels B-E are Sentinel-1A and Sentinel-1B SAR backscatter images. Arrows show the radar look direction.