Data concerning tidal ranges along the seacoasts of the United States are 

 given to the nearest tenth of a meter or foot in Table 3-3. Spring ranges are 

 shown for areas having approximately equal daily tides; diurnal ranges are 

 shown for areas having either a diurnal tide or a pronounced diurnal 

 inequality. Detailed data concerning tidal ranges are published annually in 

 Tide Tables, U.S. Department of Commerce, National Ocean Service. Prediction, 

 datum planes, and statistics of tidal data are discussed in Harris (1981). 



Table 3-3. Tidal ranges. 



2. 



Tsunamis. 



Long-period gravity waves generated by such disturbances as earthquakes, 

 landslides, volcano eruptions, and explosions near the sea surface are called 

 tsunamis. The Japanese word tsunamis has been adopted to replace the 

 expression tidal wave to avoid confusion with the astronomical tides. 



3-92 



