BY DR. JOHN B. TRASK.
As in the preceding year we have had much frequency in shocks of earthquake, with but trifling damage.
January 9th, 7 h.—A smart shock at Santa Rosa, Sonoma County.
January 19th, 8 h. 8 m.—A light shock at San Francisco.
March 5th, 8 h. 45 m.—A light shock at Visalia, consisting of a tremulous motion, succeeded by a roll or wave after an interval of about four seconds.
March 7th, 23 h.—A smart shock at San Francisco.
March 8th, 6 h. 22 m.—A smart shock at San Francisco.
March 30th, 7 h. 28 m.—A very smart shock at San Francisco; this was felt at Oakland.
April 15th, 0 h. 40 m.—A severe shock occurred at San Diego, consisting of three waves, following each other in quick succession; the shock was preceded with a loud rushing sound.
April 18th, 13 h. 31 m.—A light shock at San Francisco, and noticed at Angel Island and Oakland. This shock was severe at San Juan (south), and felt at precisely the same hour.