A decomposition of strong ground motion
The Cedar Hills Nursery strong motion record of the 1987 October 1st Whittier Narrows earthquake can be decomposed into five physically distinct components. These are the usual radial, circumferential and vertical components, plus a 2.84 Hz resonance along 317° N and a 3.27 Hz resonance along 317° N. The significance and possible cause of the resonant parts are discussed.
Campbell, K.W. 1988. The Whittier Narrows, California Earthquake of October 1, 1987 - Preliminary Analysis of Peak Horizontal Acceleration. Earthquake Spectra 4(1):115-137. DOI: https://doi.org/10.1193/1.1585468
Shakal, A., Huang, M.J. and Cao, T.Q. 1988. The Whittier Narrows, California Earthquake of October 1, 1987 - CSMIP Strong Motion Data. Earthquake Spectra 4(1): 55-100. DOI: https://doi.org/10.1193/1.1585466
Copyright (c) 1994 W.R. Stephenson
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