MINOR GEOLOGICAL EFFECTS OF THE EARTHQUAKE. 405 
_ Briceland, Humboldt County (J. W. Bowden). — The pressure on the flow of natural 
gas was doubled in the vicinity. 
Covelo, Mendocino County (EK. 8. Larsen). — Some springs and wells in the vicinity 
went dry, while others flowed more freely. 
Laytonville, Mendocino County (A. S. Eakle).— A sulfur spring had its volume of 
water increased at least threefold by the shock, according to report. 
Mendocino, Mendocino County (O. H. Ritter).— Wells in the lower part of town 
became full to overflowing and a heavy seepage of water was observed in the yard of 
the Alhambra Hotel. 
(W. Mullen.) —The flow of a number of springs was increased. 
Ukiah, Mendocino County (S. D. Townley). — The water in the well at the Observa- 
tory was very noticeably roiled for several days after the shock. The Ukiah press for 
April 27 reports some very marked changes in the flow of springs near Ukiah. A spring 
near the KE. Clemens Horst Company’s ranch, which. supplied water for domestic and 
ranch purposes, stopt flowing after the earthquake. The ranch is about 2 miles north 
of Ukiah and a little west of the center of the valley, and the spring is in the foot-hills 
on the edge of the valley, nearly a mile to the west of the ranch. Pipes connected the 
spring with 2 tanks on the ranch, the spring having supplied the ranch with water for 
a great many years. The foreman, John Eldred, states that the day after the earth- 
quake it was noticed that no water was flowing into the tanks from the spring. Inves- 
tigation showed that the spring, which comes out of rock, was absolutely dry. Mr. 
Eldred and his men worked for two or three weeks, digging, drilling, and blasting, in 
the effort to regain a supply of water; but these efforts were futile and were finally 
abandoned. <A well 75 feet deep was dug on the ranch and a wind-mill erected. Eldred 
went to the site of the spring several times during the summer and early fall, but there 
was no water. Upon going to the place in the early part of the winter, after the rains 
had begun, it was found that the spring was again flowing with a largely increased volume 
of water. He estimated that the flow was about doubled. The spring was still flowing 
with the increased volume on March 15, 1907. 
Hemlock, Mendocino County (C. D. C. Bowen). — Some springs flowed more abun- 
dantly after the shock. 
Lake County (C. E. Weaver). — At Highland Spring, in Lake County, none of the 
springs dried up, but one new soda spring was formed in the Franciscan rocks. ‘The 
mineral springs in all parts of the county are reported to have increased in flow and 
number. The artesian wells in Scott’s Valley, west of Lakeport, have diminished in 
flow, and several have stopt flowing. Many wells have dried up, but this was not con- 
fined to any particular locality or part of the county. The shock apparently had no 
effect upon the waters of the northern part of Clear Lake, nor upon the springs in that 
part of the district. 
Lakeport, Lake County (J. Overholser). — The flow of many springs increased on 
account of the earthquake, while the flow of artesian wells decreased. ' 
Annapolis, Sonoma County (G. W. Fiscus). — Wells and springs have gone dry in 
places, and water has come to the surface where there was none before. 
Sebastopol, Sonoma County (R. M. Hathaway). — The wells in this vicinity were all 
stirred up, the water becoming filled with sediment, as tho a heavy rain had washt in 
surface water. A small brook a little to the left of a fissure in the soil on the Blundon 
place had its flow of water so increased that the owner of the place had his attention 
called to it by the roaring of the water. 
Santa Rosa to Sonoma, Sonoma County (E. 8. Larsen). — At the city pumping station, 
1.5 miles east of Santa Rosa, there are 4 wells, dug 50 feet and connected with a tunnel 
450 feet long. Within each well there is a bored well 8 inches in diameter and 108 feet 
