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.
During the past year we have had occasion to note the occurrence of eight shocks of earthquake in this State. This number is one-half less than that in 1857, and one-third less the number in 1856. The shocks, with one exception, have been unmarked by anything like violence, being little else than mere vibrations or tremors, not noticeable by the great majority of the people. They are as follows:
February 10th.—A smart shock at Kanaka Flat, Sierra County. No time noted.
February 15th, 4h. 20m.—A light shock in San Francisco. Was observed in the County of San Mateo ten miles south of the city.
August 19th, 22h. 10m.—A light shock in San Francisco. The motion was east to west, and was undulatory.