San Francisco 1906 (English)

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 7.9 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 took place both before and after the earthquake's impact. Accumulated strain on the faults in the system was relieved during the earthquake, which is the supposed cause of the damage along the 450-kilometer-long segment of the San Andreas plate boundary. The 1906 rupture propagated both northward and southward for a total of 296 miles (476 km). Shaking was felt from Oregon to Los Angeles, and inland as far as central Nevada. 79 pages.