Determination of site amplification in the Los Angeles urban area from inversion of strong-motion records
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Abstract
The amplification of strong ground motion at sites in the greater Los Angeles, California, region is determined using the generalized-inverse method of Andrews (1986). Site-amplification estimates are determined at 281 strong-motion sites that provided horizontal-component accelerograms from the 1971 San Fernando, 1987 Whittier Narrows, 1991 Sierra Madre, or 1994 Northridge mainshocks. The estimates are determined relative to the spectral level recorded at a single reference site. In a second inversion, a source-site interaction term is added to Andrews's (1986) model to quantify the effect selected mainshock records have on site-amplification estimates. The source-site interaction term is applied to the San Fernando Valley sites' records of the Northridge earthquake and to three Los Angeles basin sites' records of the Whittier Narrows mainshock.
Study Area
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Determination of site amplification in the Los Angeles urban area from inversion of strong-motion records |
| Series title | Bulletin of the Seismological Society of America |
| DOI | 10.1785/BSSA0870040866 |
| Volume | 87 |
| Issue | 4 |
| Publication Date | August 01, 1997 |
| Year Published | 1997 |
| Language | English |
| Publisher | Seismological Society of America |
| Description | 22 p. |
| First page | 866 |
| Last page | 887 |
| Country | United States |
| State | California |
| City | Los Angeles |
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