The San Francisco Earthquake and Fire of April 18">
The San Francisco Earthquake and Fire of April 18, 1906, Use back bar to return or select Index Brickwork thrown down by earthquake vibration. Tower of Union
Ferry Building, (note clock stopped at time of quake est. 5:16a.m.)
and their effects on structures and structural materials.
(USGS report, 1907)
photograph submitted by Richard L. Humphrey