Homeland Infrastructure Foundation Level Data HIFLDA feature layer displaying historical tsunami observations from NCEI's Global Historical Tsunami Database. Natural hazards such as earthquakes, tsunamis, and volcanoes affect both coastal and inland areas. Long-term data from these events can be used to establish the past record of natural hazard event occurrences, which is important for planning, response, and mitigation of future events. NOAA's National Centers for Environmental Information (NCEI) plays a major role in post-event data collection. The data in this archive is gathered from scientific and scholarly sources, regional and worldwide catalogs, tide gauge reports, individual event reports, and unpublished works. For more information, please see: https://www.ncei.noaa.gov/products/natural-hazardsFileengPennsylvania Spatial Data Access (PASDA)PublicHistorical Tsunami Observations [Pennsylvania]DatasetsPennsylvania