I 



KARTHQUAKES ON THE PACIFIC COAST 75 



tinct shocks. During the remainder of the day the shocks con- 

 tinned at intervals of five- to ten minutes: lig-ht shocks con- 

 tinued until the morning- of the 6th of September, when the party 

 moved their camp. Up to this time there had been about five 

 hundred shocks. September 6-11, one or tvpo shocks every hour. 

 September 17, 18, 19, about one shock every hour. September 20, 

 21, 22, much more frequent and severe; then the frequency and 

 violence abated, but continued at intervals of an hour or so up 

 to the time they left on the 28th of September." — J. E. Clayton, 

 M. E., in Proceedings of the California Academy of Sciences, vol. IV, 

 part 1. See also Perrey. — Mem. Cour. 23, p. 6.4. 



1868. September 3, etc.; 



Not felt at Independence, Inyo County. — B. Ms. 



1868. September 13, 14, 1.5; 



A correspondent of the Sacramento Union, writing from Owens Lake, 

 gives an interesting account of a succession of earthquakes that 

 took place in that region, among the mountains, on the 13, 14, 15 

 of September. The shocks were severe enough to rattle down 

 rocks from the mountains into the valleys and to excite great 

 alarm among the few inhabitants. About the same time there 

 was an earthquake in Alpine County which w^as quite severe, 

 showing that the commotion must have extended over hundreds 

 of miles. — Proceedings of the California Academy of Sciences. 



1868, September 4-17; 



Inyo County, Cal., September 4, two shocks; forty shocks in one 

 hour at Lone Pine; September 12, one shock; September 14, two 

 shocks; September 17, one shock; September 11-12, three hundred 

 shocks; the sky was very full of smoke. — B. Ms. 



1868. September 17; 



Two shocks at Nevada City, Cal. — B. Ms. 



1868. September 19; 9 a. m. 



Two heavy shocks at Alpine, Cal. The air became dark, and moun- 

 tains one-half mile distant could not be seen. A 5 p. m. other 

 shocks. — B. Ms. 



1868. September 26; 12:40 a. m.; VIII. 



Ukiah, Mendocino County, Cal., severe shock; tumbling furniture 

 about. — B. Ms. 



1868. October; 



Near head of Kern Eiver. {S. F. Bulletin, October 17, 1868, says: 

 " There is quite a phenomenon on the Sierra Nevadas, at the head 

 of Kern Kiver. The earth has been shaking for more than two 

 weeks — almost a constant shake. It shakes the rocks down from 

 the mountain, and makes the earth wave like the sea." * * *] 



