Porcella, R.L., E.C. Etheredge, R.P. Maley, and A.V. Acosta, Accelerograms
Recorded at USGS National Strong-Motion Network Stations during the MS=6.6
Northridge, California Earthquake of January 17, 1994, U.S. Geological Survey
Open-File Report 94-141, Menlo Park, California, 1994.