EAKTHQUAKES ON THE PACIFIC COAST 137 



Siisanville: the heaviest earthquake ever felt here occurred at 10.05 

 last night, succeeded by lighter shocks at shoit intervals during' 

 the entire night. 



Downieville: there was an earthquake last night at 10.07 lasting 

 about a minute. The weather is warm. The mercury this after- 

 noon marked 90 degrees. 



Grass Valley: an earthquake was felt here at 10 o'clock last night. 

 The shock was quite heavy. 



The following is part of a letter to the San Francisco Call: 



The series of earthquake shocks that commenced here on the 

 evening- of the 19th inst. have been continued at intervals up to 

 the present. Although the first shock was by far the hardest, 

 there have been a number since that have made things quite 

 lively. EeiJorts from different localities within a few miles of 

 here point to the fact that this place. Willow Creek, and Eagle 

 Lake appear to be the centers of the disturbances, the surround- 

 ing country being less disturbed. The section named above could 

 be included in a circle twenty-five miles in diameter. Since the 

 first shock some curious phenomena have been developed. The 

 spring from which the town of Susanville is supplied with water 

 has been largely increased in its volume of water, as also manj"^ 

 others in this vicinit5^ The waters are of a milky whiteness. 

 The water of Eagle Lake has been greatly disturbed and is quite 

 muddy. At the south of Eagle Lake and extending many miles 

 is a range of high volcanic hills. A number of persons who were 

 near or on these hills last Friday heard loud rumblings to the 

 west, accompanied by loud detonations like the firing of very 

 heavy artillery, while the earth seemed to keep up an almost 

 uninterrupted trembling motion. A slight trenabling is also no- 

 ticed much of the time here in town. A farmer in Willow Creek 

 Valley, and who was at work in a large irrigating ditch at the 

 time of one of the recent shocks, had the water thrown out of his 

 ditch, so violent were the oscillations of the earth. A chimney 

 in the house of S. Knudson, in Willow Creek, was thrown down 

 by the first shock. (VII? VIII?). 



San Francisco: news from Susanville in the Sierra Nevadas says 

 slight earthquake shocks continue, and that the people have 

 become so accustomed to the constant trembling of the earth 

 that they pay no attention to it. — S. F. papers. 



Carson City, Nevada: Prof. C. W. Friend sends a seismograph record 

 which shows a maximum motion of 5 millimeters (magnified four 

 times about equally distributed in all azimuths (10.00 p. m., S. N., 

 light). 



1889. June 20. 



Sacramento: a shock. 



