How Might the Thermosphere and Ionosphere React to an Extreme Space Weather Event?

Timothy J Fuller-Rowell, Univ of Colorado/CIRES, Boulder, United States, Mariangel Fedrizzi, Univ of Colorado/CIRES, Boulder, CO, United States, Mihail Codrescu, NOAA, Space Weather Prediction Center, Boulder, CO, United States, Naomi Maruyama, Univ of Colorado-CIRES, Boulder, CO, United States and Joachim Raeder, University of New Hampshire, Durham, NH, United States