EARTHQUAKES OX THE PACIFIC COAST 61 



in fine clear weather. At 7:10 p. m., ship's time, felt another 

 light shock of about 15 seconds duration and from 8 to 12 mid- 

 night felt two more very light shocks; but did not note the time. 

 The captain states that he had experienced an earthquake at sea 

 on a former occasion so he knew what it was; but the one felt 

 before was nothing to this one either in force or duration. — J. T. 

 McMillan. 



1906. August 4; Berkeley; 11:19 p. m. 

 Lick Observatory; .5:39 a. m. I. 



1906. August 5; Berkeley; 1:53 a. m.. 3:25 a. m., and (5:15 a. m. — Prof. 

 A. O. Leuschner. 



1906. August 5; Fort Ross; 1:50 p. m.— G. W. Call. 



1906. August 6; Lick Observatory; 10:32:2 a. m. IL 



1906. August 12; Rio Vista; 6 a. ni. 



1906. August 14; Salinas; 8:30 a. m. and 9:35 a. m. Light. 



1906. August 15; Tequisquita Rancho; 4:40 a. m. 



1906. August 16; Berkelej^; 4:17:58 p. m. Recorded on Omori seismograph. 

 This is the "great Valparaiso earthquake." 



1906. August 19; San Francisco; 9:00 a. m. Tremor and jolt. — A. G. 

 McAdie. 



1906. August 19; Tequisquita Rancho; 2 a. m. 

 Salinas; 1:59 a. m. Sharp. 



1906. August 21; in the Gulf of California. Latitude N. 26° 19", longitude 

 W. 110° 25" at 2:15 p. m.; duration 1 minute. The vessel trembled 

 and the sensation was as if the ship were bumping on rocks. Shock 

 felt by all hands. Bark, "St. James; " Captain, F. O. Parker. On 

 arrival at Guaymas, shortly afterward, inquiry made if shock had 

 been felt there but none had been noted. — J. T. McMillan. 



1906. August 22; Xapa; 1:55 a. m. — W. H. Martin. 



1906. August 25; Ferndale; 1:40 p. m. Light shock. — J. A. Shaw. C. E. 



1906. August 26; Ferndale; 9:09 p. m. Light shock; 3 seconds' duration. — 

 J. A. Shaw, C. E. 



1906. August 27; Point Loma; 10 a. m. 



1906. August 28; Ferndale; about 3 a. m. — J. A. Shaw, C. E. 

 Tequisquita Rancho; 11:40 a. m. 



1906. August. 29; Mt. Tamalpais; 7:59:35 a. m. Vibration southeast to 

 northwest; duration 2 seconds.— W. W. Thomas. Weather Bureau. 



1906. August 30; Sonoma; 2:12 a. m. Light. 



1906. August 31; Ft. Ross; 9:52 a. m. 



