I 



EAETHQUAKES ON THE PACIFIC COAST o7 



1S60. April 19; 



Several shocks, S. F., Cal. — Perrey. 



I860, April 26; 



Eruption of Mt. Baker. — Perrey. [?] 



1S60. May 7; 



Port Townsend, W. T.— Perrey.— P. 



1800. Maj' 25; al»oiit 6 a. m. 



Two shocks at S. F., Cal.— B. Ms.— Sacramento Union, May 28, 18(50. 



I860. June 1; evening. 



Mariposa. — B. Ms. — Sacramento Union, June 9, 1860. 



I860. September 23; 10 a. m. 



S. F., Cal.— B. Ms.— Sacramento Union, September 26, 1860. 



1860. September 23; about 9 p. m.; VI. 



Severe shock at Martinez. — B. Ms.— Alta, October 1, 1860. 



I860. September 30; 10 a. ni. 



S. F., Cal.— Perrey. 



I860. November 12; V. 



Smart shock at Humboldt Bay, Cal. — J. B. T. Felt in various parts 

 of the country, also. — B. Ms. Alta, November 24, 1860. 



1S60. November 24; 1:30 a. m. 



S. F., Cal.— Perrey. 



1860. December 21; 61i. 30m.; I? 



Eepeated slight vibrations, extending over a period of half an hour, 

 noticeable only by the vibrations of the mercury in the barometer. 

 S. F., Cal. — J. B. T. The next day a violent earthquake at Santiago 

 de Chile. — Milne's Earthquakes, j). 331. [Probably no connection 

 between these events.] 



1861. January 12; about 1 a. m.; VI. 



Two severe shocks in Trinity County, Cal. — B. Ms. Sacramento 

 Union, January 29, 1861. 



1861. January 27; S a. m. 



Butte County, Cal. — B. Ms. Sacramento Union, February 4 and Feb- 

 ruary 12, 1861. (Supposed to be an explosion of g'unpowder, or 

 of a meteor, or the rumbling of an avalanche. Heard also in 

 Sierra County.) 



1861. February 2; 1:30 a. m. 



San Francisco, Cal. — Perrey. 



1861. Marcb 23; ? a. m.; V. 



Quite severe at S. F., Cal. — B. Ms. — Sacramento Union, March 25, 1861. 



