Historical Tsunamis

historical tsunami key This map shows historical tsunami data from 1610 BC to 2020. Large, colored circles indicate earthquake magnitude: red= >9.02 - 9.5; purple= 8 - 9.02; bright pink = 7 - 8; pink = 6 - 7; pale pink = 3.1 - 6. Center circles indicate the validity of the tsunami occurrence: yellow = definite, greeen = probable, blue = questionable. Pink lines are tectonic plate boundaries. The date in the event popups are given in Universal Coordinated Time (also known as Greenwich Mean Time). Maximum water height is in meters. The local date may differ by one day.

Data Sources

Tsunami layer data from National Geophysical Data Center / World Data Service (NGDC/WDS): Global Historical Tsunami Database. National Geophysical Data Center, NOAA. https://data.nodc.noaa.gov/cgi-bin/iso?id=gov.noaa.ngdc.mgg.hazards:G02151. Location is the approximate geographic source location. Events prior to 1900 were not instrumentally located; therefore, the location given is based on the latitude and longitude of the city where the maximum effects occurred.

Search the NOAA Tsunami Event Database: https://www.ngdc.noaa.gov/nndc/struts/form?t=101650&s=70&d=7

Tectonic plate boundaries layer from EsriTrainingSvc; modified from source data by U.S. Geological Survey.



DOGAMI reserves the right to update data without notification as new information becomes available. This product is for informational purposes and may not have been prepared for or be suitable for legal, engineering, surveying, or site specific purposes. Users of this information should review or consult the primary data and information sources to ascertain the usability of the information.



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