138 PROCEEDINGS OF THE CALIFORNIA 



Jan. 24th, 22h. — A heavy shock of earthquake was felt at Downieville, which 



lasted seven seconds. 



This earthquake was quite severe at Gibsonville on the north, at Forrest 

 City, Minnesota, in Sierra County, and at Orleans Flat, Eureka, in Nevada 

 County, at Georgetown and Nashville in El Dorado County on the south, and 

 at Keystone Ranch, in Yuba County, on the west. The entire distance north 

 and south affected was ninety-four miles, and in a westerly line, thirty miles. 

 The shock was preceded by a deep rumbling, and the rushing sound of wind in 

 the distance. It shook buildings severely. A large pinnacle of rocks on the 

 summit of the Downieville Buttes was thrown down, and some of the large frag- 

 ments reached the south branch of the North Yuba, at the base of the moun- 

 tain. 

 Feb 5th, 22h. — A light shock was felt at Wolf Creek and the north-east part 



of Nevada County. 

 April 7th, 18h— A light shock was felt at Gibb's Ferry, Trinity County, 



and was experienced as far north as Callahan's Ranch, at the head of Scott's 



Valley, Siskiyou County. 

 June 25th, 14h. — A smart shock was felt at Santa Barbara, and extended 



northward as far as the valley of Santa Maria. This shock was cotempora- 



neous with one that occurred in Switzerland. 

 July 10th, 9h. 30m.— Alight shock was felt in Georgetown, El Dorado County, 



which lasted about four seconds. 

 July 10th, 20h. 15m. — A severe shock at Los Angeles, which did considerable 



damage. 



There were four distinct shocks during the earthquake, with a period of about 

 two or three seconds elapsing between each vibration. During their continu- 

 ance the ground opened in several places, in fissures of one or two inches, the 

 marks of which remained for several days afterwards. There were some twenty- 

 six buildings in the city more or less injured, which I personally examined, and 

 among them the church, the west wall of which was split from top to bottom in 

 two places, the fissures being from one to two and a half inches in breadth, run- 

 ning entirely through. The east wall split at a slight angle from the perpen- 

 dicular, and had but one fissure. The walls of the Star Hotel were split in 

 several places, and on the west side there appears to have been a decided hori- 

 zontal motion, as the wall was displaced on that side horizontally to the depth 

 of about one inch, and some eight or nine feet in length. The amount of 

 displacement decreased from the west end of the building towards the center. 

 It is a fact worthy of note, that none of the thin adobe walls of the buildings 

 suffered injury, while most of the thick-walled buildings were injured to a greater 

 or less extent. 



During the earthquake, many articles were thrown down ; those that were 

 standing on shelves against the east end of the buildings were thrown westward 

 on to the floor, and those on the opposite end of the buildings were thrown 

 back in an inclined position against the walls. These features were noticed in 

 the drug stores of Doctors Winston and Hope, situated on the main street, and 

 a short distance west of the church. 



