The San Francisco Volcanic Field lies not near the city of the same name but in northern Arizona. Covering 1,800 square miles (roughly 4,700 square kilometers), the volcanic field consists of volcanoes and lava flows, including SP Crater. The Advanced Land Imager (ALI) on NASA’s Earth Observing-1 (EO-1) satellite captured this natural-color image on April 17, 2010.