"The magnitude 7.1 Lorna Prieta earthquake (5:04 p.m. P.d.t., October 17, 1989) is the largest earthquake to strike the San Francisco Bay region and environs [...], home to more than 5.9 million people, since the great San Francisco earthquake of 1906. It was felt over an area of approximately 400,000 square miles, from Los Angeles on the south to the Oregon-California State line on the north, and to western Nevada on the east. Within about 15 seconds of seismic shaking of the region extending from Monterey Bay to northern San Francisco Bay, the Lorna Prieta earthquake resulted in:  62 known deaths, 3,757 injuries, and more than 12,000 people homeless;  Over $6 billion property damage;  Disrupted transportation, utilities, and communications."
U.S. Geological Survey Circular 1045
Government Publishing Office: http://www.gpo.gov/