EARTHQITAKES ON THE PACIFIC COAST 151 



inches in places. Ttie bridge, fifty feet high, is impassable at 

 both ends, the rails being pulled a foot apart. A large force of 

 men is at work, and they expect to have the track so that trains 

 can pass in a few hours. At Sargents and Gilroy there were 

 more than a dozen shakes, and chimneys were knocked down. 

 (VIII?) (See Gilroy preceding). 



1890. Carson City, Nevada. 



No time reported. The-duplex seismograph indicates a disturbance 

 about one-quarter as large as that at Berkeley. (C. W. Friend.) 



1892. San Jose, April 24; 3:37:43 a. m. 



Seismograph at the University of the Pacific furnishes a diagram 

 having a maximum double amplitude of 16.2 mm. From the man- 

 ner in which the index has run all over the glass one would think 

 the equilibrium of the pendulum too nearly neutral. 



1890. May 11; East Oakland; 1:00:15 p. m. (Mr. Ireland); 1:00:18 

 p. m. (Mr. Boise). 



Mr. Blinn's seismograph makes the disturbance almost entirely in 

 an east and west direction; its amount (maximura double ampli- 

 tude) vsras 1.0 mm. The diagram w^hich Prof. Keep sends from 

 Mills College indicates a slightly smaller disturbance in a direc- 

 tion southAvest and northeast. 



1890. May 11; San Francisco; 1:00:15 p. m. (Mr. William Ireland). 



Intensity = IV, Rossi-Forel scale. S. F.: Ih. Im. p. m. Light 

 shock, duration 2 sec. — T. T. 



Following is a newspajier account of the shock as felt at San Lean- 

 dro, May 11: "A very heavy shock of earthquake was felt at this 

 place at 1.03 o'clock this afternoon. The oscillations were north 

 and south and the duration 5 or 6 seconds. No damage reported, 

 although many of the older houses in town were loosened up con- 

 siderably, notably the depot of the Southern Pacific Company." 



1890. May 14; Santa Crnz. 



The following general account is taken from the newspaper of even 

 date: 



Ever since the big earthquake of the 24th of April there have been 

 daily seismic disturbances along the line between Pajaro and 

 San Juan, where the earthquake was heaviest. Each day three 

 or four small shocks occur, and yesterday six quite pronounced 

 ones were felt. Two were felt at 5 o'clock this morning in this 

 city. The fissure made on the Chittenden ranch, above Pajaro, 

 during the big earthquake has been gradually increasing in depth 

 and width. The railroad company is keeping a force of car- 

 penters in the vicinity of the bridges between Pajaro and Gilroy 

 for fear of damage by the shocks if they get heavier. 



