U.S. Tsunami Program Reauthorization in P.L. 115-25: Section-by-Section Comparison to P.L. 109-479, Title VIII [May 3, 2017] [open pdf - 698KB]
"The National Oceanic and Atmospheric Administration's (NOAA's) National Weather Service (NWS) manages two tsunami warning centers, which monitor, detect, and issue warnings for tsunamis. The NWS operates the Pacific Tsunami Warning Center (PTWC) at Ford Island, HI, and the National Tsunami Warning Center (NTWC) at Palmer, AK. The tsunami warning centers monitor and evaluate data from seismic networks and determine if a tsunami is likely based on the location, magnitude, and depth of an earthquake. The centers monitor relevant water-level data, typically with tide-level gauges, and data from NOAA's network of Deep-Ocean Assessment and Reporting of Tsunami (DART) detection buoys to confirm that a tsunami has been generated or to cancel any warnings if no tsunami is detected. In the 114th Congress, the House passed legislation amending U.S. tsunami activities (H.R. 34) and the Senate passed similar legislation (Title V of H.R. 1561). However, the 114th Congress did not enact a final version of the legislation. [...] This report compares the enacted legislation text with P.L. 109-479, Title VIII, section by section, with brief comments on selected comparisons about how changes in P.L. 115-25, Title V, affect P.L. 109-479, Title VIII, and the authorized tsunami activities."
CRS Report for Congress, R44834
Federation of American Scientists: http://www.fas.org/sgp/crs/index.html