July 5th, 20 h. 3 m.—An earthquake at San Francisco, not severe; this consisted of four distinct vibrations occurring during a period of seven minutes. The second vibration and the longest lasted nineteen seconds. The shortest vibration was six seconds in length. The elapsed time between the waves varied from forty seconds to one and one-fourth minutes.
July 21st, 2 h. 7 m.—A smart shock was felt at San Francisco.
” ” 22 h. 40 m. 38 s.—A very smart shock of earthquake at San Francisco, consisting of two waves at four seconds apart. The direction of the motion was north thirteen degrees east. The displacement was one and a fourth inches, at twenty feet four inches from the ground. Pendulum suspension eighteen inches.
The earthquake was experienced at San José at the same hour, and consisted of four strong shocks. At Stockton the earthquake was severe, and took place twelve minutes later than at this city. The earthquake was felt at Los Angeles, but was not very heavy. No time is given from this latter locality.
July 25th, 23 h. 56 m.—A shock of earthquake at Los Angeles.
Aug. 17th, 22 h. 39 m.—A light shock of earthquake at Nevada and vicinity.
Aug. 18th, 5 h. 18 m.—A very strong shock of earthquake was experienced at Grass Valley and Nevada, which threw down a wall of stone and brick in the well of Dr. Fellows. This earthquake was felt at Gibsonville at the north and at Marysville to the west; at the latter locality it was twelve minutes later than at Grass Valley.
Sept. 6th, 10 h. 3 m.—A shock of earthquake at San Francisco.
Sept. 20th, 11 h. 0 m.—A light shock of earthquake at San José; it was observed at the Mission Dolores.
Sept. 27th, 10 h. 32 m.—A heavy shock at Mission San Juan, Monterey Co.