February 13, 1869 Earthquake: San Francisco, California, United States

1869, February 13, 4:30 local time (11:30 UTC). There was a light shock at San Francisco. The tide gauge established at Fort Hornet recorded several earthquakes at unknown points (Reference #415).

1869, February 10, 4:50 A.M. local time. Perrey (1872) reports, "The 13th at four hours 50 minutes in the morning at San Francisco a shock was felt. The marigraph at Fort Hornet indicated shaking at several unknown points." The Mining and Scientific Press (February 20, 1869, p. 114, col. 1) reports, "Oceanic Earthquake-The self-registering tide gauge at Fort Point, which never fails to record the slightest variation in the tide, indicated on the 10th instant an unusual disturbance in all probability caused by a submarine earthquake." The tide gage at Fort Point for the 13th does not show any activity and the record for February 10th shows short period and long period noise but no tsunami. Validity 1 (Reference #237).