190709-N-DH745-670 EWA BEACH, Hawaii (9 July 2019) Dr. Chip McCreary, director of the National Oceanic and Atmospheric Administration (NOAA) Pacific Tsunami Warning Center (PTWC), demonstrates PTWC's procedures for responding to a potentially tsunamigenic earthquake and modeling potential impacts to Cadet Phillip Cutsinger, USMA 2020, and Cadet Casey Ludwig, USAFA 2021. PTWC is responsible for tsunami predictions and warnings for the seismically volatile Ring of Fire region around the Pacific Ocean, excluding Alaska and the western coast of Canada and the United States. (U.S. Navy photo by Lt. Caitlin Fine/Released)