1851.
May 15th.—Three severe shocks in San Francisco. During this earthquake windows were broken and buildings severely shaken. A large amount of merchandize was thrown down in a store on California Street. The shipping in the harbor rolled heavily. An eruption of Mauna Loa and shock in the Sandwich Islands same day.
May 17th.—A light shock in San Francisco.
May 28th.—A light shock on the Salinas.
June 13th.—A smart shock at San Francisco. This was felt at San Luis Obispo and San Fernando.
December 2d.—A shock at Downieville.
December 31st.—A smart shock at Downieville. Total recorded in 1851, six.
1852.
From the beginning of this year until the middle of its last quarter, no disturbances of the coast was noted until the month of November. In this month the southern portion of the State was violently disturbed.
November 26th.—The number of shocks on this day at San Simeon was eleven, and at Los Angeles and San Gabriel the same number. Nearly or quite the same number was also observed by parties having in charge a Government train in transit from Fort Yuma to San Diego.