0350 Staff reads 20.0 feet. 



1020 Staff reads 12.7 feet 



1031 Staff reads 12.5 feet. 



03123^ AST recorded earthquake on seismograph. 



12^5 Recorded earthquake on seismograph. 



1^+15 Tsunami of 6-lnch amplitude started on marigram. 



2312 Light tremor, duration, 1 minute and Uo seconds. Seismograph 

 indicated local quake. 



OUOO3O Tsunami of 6-inch amplitude started on marigram. 



NOTES 



1. Unless otherwise indicated, all times are Alaska standard 

 time (+10). 



2. Heights were referred to staff zero in the following manner. 

 After each crest, a pencil mark was made at the resultant water line in 

 a building very near the water. When it was impossible to make a pencil 

 mark, the water level was referred to the nearest identifying feature 



on the building and marked in pencil after the water had ebbed. The 

 highest mark was then measured in reference to the tide staff at the 

 Tide Gage and the heights of all other wave heights in the building where 

 the pencil marks were made were subtracted from this height. The building 

 mentioned is not in the immediate vicinity of the Tide Gage. 



3. Other highest water marks on cliffs and buildings were measured 

 along a 3-mile area from Nyman Peninsula to about 1/2 mile northeast of 

 the mouth of Buskin River. All were within 2 feet of the highest water 

 mark at the Tide Gage . 



U. 



k. The Tide Gage is located on Marginal Pier, Nyman Peninsula, 

 S. Naval Station, Kodiak, Alaska, and is in Womens Bay. 



5. All Tidal Bench marks were connected by spirit leveling on 5-6-T 

 April and the relative elevations of the Tidal Staff and bench marks are 

 unchanged from previous values . 



6. An analysis of the Tide Station hourly heights for the 5-day 

 period 2-6 April gives a mean value for the tide level of 15-8 feet 

 referred to zero of the Tide Staff. With the assumptions that this 

 short record is a reasonable approximation of mean sea level (MSL) 



A-6 



