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![Record of elevations of various official observing sites in San Francisco fromthe date of first official observation on March 20, 1871, until 1907 wea05009.jpg Record of elevations of various official observing sites in San Francisco fromthe date of first official observation on March 20, 1871, until 1907](/sites/default/files/styles/max_1300x1300/https/s3.amazonaws.com/s3-east-testmedia-noaa.woc.noaa.gov/dam/Photos/legacy/pl23_wea05009.jpg?itok=R3M6d6Wa)
Description
Record of elevations of various official observing sites in San Francisco fromthe date of first official observation on March 20, 1871, until 1907. Note inred for period April 18-22, 1906, details effect of San FranciscoEarthquake. Earthquake and fire. Building burned; all records lost. (Image credit: Historical Collections of the NOAA Central Library; NOAA Central Library Historical Collections)