January 18th, 9h.—A light shock at Martinez and Benicia. January 20th, 8h. 30m.—A smart shock was felt at Santa Cruz and Mission San Juan. January 21st, 23h.—On the evening of this day a smart shock was felt at Mariposa. The wave and sound seemed to travel from north-west to south-east. It was accompanied with a report like that of a distant gun. February 5th, 7h.—A smart shock was felt in San Francisco, which shook the buildings that are situated on made-ground very severely, while those situated on firmer bottoms were affected. This shock was felt at Oakland and Stockton, but was not felt at San José or Sacramento, as reported at the time. March 14th, 15h.—A severe shock was felt at Santa Barbara and Montecito. It was momentary in duration, attended with a loud report. March 23d, 12h. 27m.—A light shock in San Francisco. May 3d, 22h.—A smart shock at Los Angeles and the Monte. May 23d.—A light shock at Los Angeles; a report also that a severe shock had been felt at Fort Tejon. June 14th.—A shock was felt at Humboldt Bay. On the same day several severe shocks were experienced at the Penal Island (Carmen), Gulf of California, and which extended almost ninety miles north and south of the island. August 8th, 11h.—A smart shock was felt at Rabbit Creek, Sierra County. August 29.—A severe shock at the Tejon Reserve. No time is given. September 2d, 19h. 45m.—A light shock at San Francisco. This shock was felt at Sacramento, Marysville, Nevada, San Juan, Downieville, and Camptonville. September 14th, 2 P.M.—A light shock in San Francisco. October 19th, 18h. 30m.—A severe shock of an earthquake in San Francisco. October 20th, 12h. 8m., 12h. 35m., and 13h. 15m.—Three other shocks occurred; the last was equally severe with that of January 9th, at 8 A.M. People were much frightened, and left their beds. The shock was felt at San José, but not at Oakland. November 8th, 8h. 45m.—A shock at San Francisco, which was felt at Oakland and Bodega. December 23d, 7h.—A light shock at San Francisco. Of the whole number which have occurred during the year, two only have been felt at San Francisco that were not experienced at other localities, and four others have occurred which have been felt in common at other portions of the State—thus making about one-third of the whole number that were in common here and elsewhere. Eight of the aggregate have occurred between the summer and winter solstices. Seven have occurred during the spring and summer months, and ten during the winter and autumn. Eight have occurred between the vernal and autumnal equinoxes. 1858.