EARTHQUAKES ON THE PACIFIC COAST 245 



Napa: a distinct shock was experienced, lasting several seconds. — • 

 — S". F. Call, December 10, 1895. 



1895. Decemlber 12; Uklab; 12h. 40m. a. m. 



A slight shock. The oscillations were from east to west. — S. F. Gall, 

 December 13, 1895. 



1896. December 23; Santa Barbara; about !)b. SOin. p. m. 



An earthquake was felt which lasted several seconds. — ^Newspaper 

 report. 



1896. December 28; Mount Hamilton. 



9h. 12m. 13s. a. m., Pacific standard. — E. G. A. 9h. 12m. 01s. a. m.. 

 Pacific standard, by seismograph clock. Recorded on both seis- 

 mographs. The Ewing instrument shows a disturbance lasting 

 about ten seconds in each horizontal component, and about six 

 seconds in the vertical. 



North and south. — The waves of shortest period and greatest ampli- 

 tude occurred in this coruponent, beginning within one second 

 of the starting of the plate. The vibrations are of short period, 

 but smooth and regular. The largest one measured had a double 

 amplitude (magnified) of about }{ mm. and a period of one-fourth 

 second, which according to the formula gives an intensity of 32 

 mm. per second and would be between I and II of the Rossi- 

 Forel scale. The main portion of the disturbance lasted about 

 five seconds, some tremors for ten seconds. 



East and west. — The first few vibrations are of short period, followed 

 by slower vibrations of about two seconds. The greatest ampli- 

 tude (double and magnified) is about 14 uim. 



Vertical. — Two waves of about two and one-half seconds each and 

 a double amplitude of about 14 mni. (magnified). 



The waves are all too small to measure with any great accuracy. 



EARTHQUAKES ON THE PACIFIC COAST, 1896. 1 

 1896. Jannary 3; Dsqnimanit, B. C; 10:09 p. m., P. s. t. 



" A distinct shock of earthquake." — Reported by E. Baynes Reed, 

 Esq. 



1896. January 3; Victoria, B. C. 



A severe shock of earthquake was felt here to-night at 10.20 o'clock. 

 Many citizens in the public offices, believing the shock to be pro- 

 duced by the falling in of some large roof, or like cause, hurried 

 to the streets.^ — Newspaper report. 



' Included in tliis list are one or two cases, the correctness of which may be 

 doubted. These cases rest upou newspaper evidence entirely and are of such 

 a nature that there should be confirmatory evidence before accepting them. 

 It has been thought best to include these doubtful cases, however, and they 

 are indicated by some note. 



