Tsunami Hazard zones and Risk Mapping

The USGS and other Civil Defense agencies have mapped many areas that are particularly prone to tsunamis. Recent tsunamis, historical records, and deposits of ancient tsunamis identify some of these areas. Many coastal communities, especially those in Hawaii, have posted coastal areas with tsunami warning systems, showing maps of specific areas prone to tsunami inundation. Tsunami warning signals are in place and residents are told what to do and where to go if the alarms are sounded. Residents and visitors in these areas must understand what to do in the event of a tsunami warning, and where the escape routes may be. If there is a local earthquake, landslide, or undersea volcanic eruption, there may be only minutes before a tsunami hits, so it is essential not to waste time if the tsunami warning sirens are sounded.

Continue reading here: Tsunami Warning Systems

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