44120.
Effect of Earthquake in San Francisco, 21 Oct. 1868. (D)
The 1868 Hayward earthquake occurred in the San Francisco Bay Area on October 21. With an estimated moment magnitude of 6.3–6.7 and a maximum Mercalli intensity of IX (Violent), it was the most recent large earthquake to occur on the Hayward Fault Zone. It caused significant damage and a number of deaths throughout the region, and was known as the “Great San Francisco earthquake” prior to the 1906 San Francisco earthquake and fire.