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Site-response maps for the Los Angeles region based on earthquake ground motions

January 1, 1996

Ground-motion records from aftershocks of the 1994 Northridge earthquake and main-shock records from the 1971 San Fernando, 1987 Whittier Narrows, 1991 Sierra Madre, and 1994 Northridge earthquakes are used to estimate site response in the urban Los Angeles, California, area. Two frequency bands are considered, 0.5-1.5 Hz and 2.0-6.0 Hz. Instrument characteristics prevented going to lower frequencies, and frequencies above 6.0 Hz are less important to the building inventory. Site response determined at the instrumented locations is associated with the surficial geology and contoured to produce a continuous spatial estimation of site response. The maps in this report are preliminary and will evolve as more data become available and more analysis is done.

Publication Year 1996
Title Site-response maps for the Los Angeles region based on earthquake ground motions
DOI 10.3133/ofr96723
Authors Stephen H. Hartzell, Stephen C. Harmsen, Arthur D. Frankel, David L. Carver, Edward Cranswick, Mark E. Meremonte, John A. Michael
Publication Type Report
Publication Subtype USGS Numbered Series
Series Title Open-File Report
Series Number 96-723
Index ID ofr96723
Record Source USGS Publications Warehouse
USGS Organization Denver Federal Center; Earthquake Science Center; Geologic Hazards Science Center