PRINCE WILLIAM SOUND 



CONTROLLER DAY 



Figure 25 (a) Projection of Imaginary Wavefronts from Observation Stations 

 "back towards the Tsunami Source. The presumed source lies 

 within the region circumscribed by the heavy curves and 

 dotted line (from Van Dorn, I965) 



HINCHINBROOK ISLAND 



TRINITY ISLANDS 



TRENCH AXIS 



Figure 25 (h) Hypothetical Model of the Tsunami Source, Showing Negative 

 Wave Front Radiating towards Northwest, and Positive Front 

 Spreading out over Gulf of Alaska (from Van Dorn, 1965) 



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