Vintage: 1906 San Francisco earthquake
The 1906 earthquake preceded the development of the Richter magnitude scale by three decades. The most widely accepted estimate for the magnitude of the quake on the modern moment magnitude scale is 7.8; values from 7.7 to as high as 8.3 have been proposed. According to findings published in the Journal of Geophysical Research, severe deformations in the earth’s crust…