Audio quality isnt great, but im working on it.    https://www.nationalgeographic.com/science/2018/08/news-yellowstone-supervolcano-geothermal-energy-debate-iceland-hawaii/ Donovan, Ronan. "Yellowstone Supervolcano Could Be an Energy Source. But Should It?" National Geographic. 08 Aug. 2018. National Geographic. 11 Mar. 2019 <https://www.nationalgeographic.com/science/2018/08/news-yellowstone-supervolcano-geothermal-energy-debate-iceland-hawaii/>. https://www.nationalgeographic.com/yellowstone-national-park/ https://www.nationalgeographic.com/magazine/2016/05/yellowstone-national-parks-supervolcano-animation/ Conant, Eve. "Inside Yellowstone'sSupervolcano." National Geographic. 18 Oct. 2017. National Geographic. 11 Mar. 2019 <https://www.nationalgeographic.com/magazine/2016/05/yellowstone-national-parks-supervolcano-animation/>. https://www.nps.gov/yell/learn/photosmultimedia/webcams.htm Various, Volunteers. "Webcams." National Parks Service. 22 Feb. 2019. U.S. Department of the Interior. 11 Mar. 2019 <https://www.nps.gov/yell/learn/photosmultimedia/webcams.htm>. Ashfall by Mike Mullin