MEASURED UPLIFT OF LAND AND SEA-BED (SECTION AA , FIG. 8 ) 



ASSUMED INITIAL TSUNAMI ELEVATION ALONG AA' 



POSITION OF TSUNAMI CREST FOR BEGINNING OF SEA LEVEL RISE 



ABOVE NORMAL ( AFTER DRAWDOWN ) AT MIDDLETON IS 

 POSITION OF TSUNAMI CREST REACHING TO ABOUT NORMAL HIGHEST 



HIGH TIDE 

 INITIAL RISE OF SEA LEVEL AT MIDDLETON IS 

 UPLIFT OF LAND AT MIDDLETON IS. 

 INITIAL DRAWDOWN AT MIDDLETON IS. ( 75m) 



SEA LEVEL RISE ABOVE NORMAL ABOUT 20 MINUTES AFTER EARTHQUAKE 

 RUN-UP TO SWASH MARKS OBSERVED BY ST AMAND ( BROWN, 1964) 



Figure 3^ Inferred Mechanism of Tsunami Generation between Montague and 

 Middleton Islands, Gulf of Alaska (section line AA' , Figure 8) 



54 



