English: On July 12, 2016, the Operational Land Imager (OLI) on the Landsat 8 satellite captured a natural-color image (above) of the crater and the surrounding San Francisco Volcanic Field. The image was draped over terrain data from the Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER). Note: the scene was rotated to create this image, so north is to the right. The closeup below shows Sunset Crater as observed by OLI, but without the terrain drape (north is up). To the east of the cone, a field of dark, hardened rock from the Bonita Lava Flow is still visible.

Sunset is the youngest in an aggregation of more than 600 volcanoes in the San Francisco Volcanic Field, according to the U.S. Geological Survey. The field covers roughly 1,800 square miles (4,600 square kilometers), and many of its volcanoes formed over the course of months to years.

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