Loma Prieta, California, Earthquake October 17, 1989. Menlo Park. Seismographs at the U.S. Geological Survey record the north-south horizontal, east-west horizontal, and vertical components of the earthquake. Slide VI-3, U.S. Geological Survey Open-File Report 90-547. Open File-90-545

Digital File:njk00013

ID. Nakata, J.K. 13ct