EARTHQUAKES ON THE PACIFIC COAST 55 



Mies; 3:22 p. m. And many shocks during month.— Wm. BaiTv. 



Napa; 3:15 p. m. Sharp. — W. H. Martin. 



Lick Observatory; 3:17:40 p. m. 



San Francisco; 3:17:10 p. m. Double swing. Eecorded on seis- 

 mograph at No. 3018 Clay street. Slight horizontal motion. - 

 W. R. Eckart and A. G. McAdie. 



1906. April 26; Oakland, Chabot Observatory. Time 10:29:55 a. m. E.\- 

 plosion. 



Lick Observatory; very slight shock 10:33:35 a. ni., jolt only, no 

 swing. — Professor Tucker. 



1906. April 27; Oakland, Chabot Observatory. Time 6:15 a. m. Intensity 

 II. Again at 1:08:10 p. m.; duration 3 seconds; direction east 

 to west; intensity III. 



Eureka -Fcrndale; sharp shock at 10:30 a. m. 



1906. April 28; Napa; 12:35 a. m. Sharp.— W. H. Martin. 



1906. April 29; Lick Observatory; 4:09:21 p. m. Northwest and southeast; 

 duration 1 or 2 seconds. — Dr. Campbell. 



San Francisco; 4:09 p. m. — A. G. McAdie. 



1906. April 30; Oakland, Chabot Observatory. Time 1:00 a. ni. and 7:20 

 a. m. Shocks from this date until May 17 seemingly of circular 

 motion, no decided direction shown by seismograph. They were 

 in the nature of tremors with vertical motion predominating. — 

 Observer, Prof. Chas. Burckhalter. 



San Francisco; 1:57:30 a. m., and again at 1:59:40, and again 7:10 



a. m. — A. G. McAdie. • 



Eureka; slight shock reported to have occurred at 11:10 p. m. 



1906. May 1; Cloverdale, Napa, Peachland. 



Napa; three light shocks reported. — W. H. Martin. 



1906. May 2; Calistoga, Napa, Oakland, Laurel. 



Oakland, Chabot Observatory. Time 6:56:20 a. m.; intensity II. 



Napa; 12:35 a. m. Sharp.— W. H. Martin. 



San Francisco; 6:51:30 a. m.. light shock, and again at 8:50 a. m., 



and again 9:22 a. m.— A. G. McAdie. 

 Lick Observatory; 4:51:12-14 p. m. R.-F. I.— Dr. Perrine. 



1906. May 3; San Francisco; 6 a. m., light, and again at 9:41:22 a. m.— 

 A. G. McAdie. 

 Oakland, Chabot Observatory; 6:00:20 a. m. 

 Glenwood. 



