EARTHQUAKES ON THE PACIFIC COAST 311 



a distinct earthquake shock — something very unusual in this 

 region — was felt at Oonalaska, 30 miles away. 



1892. September 8; Fetalnma; 4Ii. 45iii. a, m. 



A light shock. The vibration seemed to be from east to west. Also 

 felt at Napa. 



1802. September 13; San Jose. 



A shock. — Cal. S. W. Service Bulletin. 



1892. September 25; StocUton. 



A shock. — Cal. S. W. Service Bulletin. 



1892. September 25; Mount Hamilton. 



I'rof. Holden reports a shock of slow period and intensity z= III of 

 the K. F. scale, as occurring at 2.10.43 p. m., P. S. T. The duplex 

 seismograph shows a displacement of the pen of 9 mm. in north- 

 northeast and south-southwest direction, with a displacement of 

 the pen at right angles to this of 3 mm. 



1892. September 25; Mills Collegre. 



Prof. Keep sends a tracing of the shock occurring at 2.10 p. m. in 

 which the greatest displacement is in a north-northeast and 

 south-southwest direction, and appears to be about 11.5 mm., and 

 at right angles to this the displacement is only 3 mm. 



1892. September 25; Alameda. 



A shock of earthquake estimated at about (V) of the R. F. scale 

 occurred at 2.11 p. m., the chandeliers swaying for several 

 minutes. The duplex seismograph gives a record in which the 

 displacement of the pen in a northwest and southeast direction 

 m.easures 77 mm., Avhich is probably exaggerated, although the 

 greatest disturbance was noticed to be in this direction. The 

 displacement of the pen in the northeast and southwest direction 

 is 20 mm. (C. D. Perrine.) 



1892. September 27; Napa City. 



A shock. — Cal. S. W. Service Bulletin. 



1892. October 26; San Bernardino; 7b. 5m. a. m. 



A slight shock. The vibration was from north to south. 



1892. October 30; Mount Hamilton; 12:17:12 a. m. 



Southeast to northwest; two slight shocks two seconds apart. In- 

 tensity = III. (W. W. Campbell.) The duplex seismograph gives 

 a record of about 2 mm. in both the north and south and east and 

 west directions. 



1892. October 30; Independence. 



Mr. C. iMulholland reports a shock occurring at 11.53 a. m. The 

 shock was quite heavy and appeared to come from the Sierras 



