EAETHQUAKES ON THE PACIFIC COAST 153 



1890. July 36. 



The Examiner contains the following: 



Sissons: There were three earthquake shocks this morning at 1.45 

 o'clock. The vibrations were north and south. 



1890. Hydesville, July 36. 



Several severe shocks of an earthquake were felt at this place at 

 1.40 a. m. to-day, lasting about twenty seconds, and another slight 

 shock at 8 o'clock. 



1890. July 28; Petaluma; 13:03:35 a. m. 



Two slight shocks from north to south. 



1890. August 17; Mills College; 6:50 a. m. (Prof. Keep). 



Slight, but distinct shock. The tracing of the seismograph shows 

 three vibrations (averaging 0.3 mm.), in a direction from one 

 point south of east to one point north of west. 



1890. Augrnst 23; Mono Lake. 



The following is from the Homer Index: 



" Eemarkable earthquake at Mono. — The southern end of Mono Lake 

 was considerably agitated last Sunday, and dwellers in that shaky 

 locality were much perturbed. Steam was issuing from the lake 

 as far as could be seen, in sudden puffs, and the water was 

 boiling fiercely, while high waves rolled upon the beach and 

 receding left the sand smoking. In a moment the air was thick 

 with blinding hot sulphurous vapor, and subterraneous moans and 

 riamblings made the witness think that the devil was holding high 

 carnival down below. The fences wabbled up and down and 

 sideways. 



" This appalling fracas lasted about two minutes. Then came a 

 blessed quiet for a moment, followed by a sudden twitch of the 

 earth, as a horse jerks his hide and dislodges a bothersome fly. 

 The shock threw men and animals off their feet with bruising 

 violence. 



" It was some hours before the lake ceased to emit columns of steam 

 and the water became very hot. Two springs near the house, 

 long noted for the coldness and purity of their water, changed 

 their character and spouted hot mud for two days, when they 

 flowed cold water again. A stack of 200 tons of hay was moved 

 70 feet south without disarranging it" (IX?). 



1890. September 3; Mount Hamilton; 3:31:20 p. m. (accurate to 

 one or tTvo seconds), P. S. T. 



Felt by Prof. Holden in third story of brick house and estimated 

 by him as II on Eossi-Forel scale. Eecorded on duplex seis- 

 mometer, but did not start the larger one. 



A slight shock was also felt at San Francisco at 2.30 p. m.; likewise 

 at Gilroy. 



