Lateral variations in attenuation of ground motion in the Eastern United States based on propagation of L/sub g/
Lateral variations in the attenuation characteristics of ground motion in the Eastern United States (EUS) are determined by studying the propagation of the L/sub g/ phase. This is achieved by detailed investigations of nearly all available short-period three-component data from a large number of LRSM seismograph stations. Both time and frequency-domain methods of analyses are employed to data from numerous earthquakes and the well instrumented underground nuclear explosion, SALMON. Maps of station terms for the vertical and horizontal components of L/sub g/, obtained in this study, may be used to estimate the largest amplitudes of the vertical or horizontal component of L/sub g/ in various parts of the EUS. In general, sites within the central stable region have the largest whereas those in the coastal plains region have the smallest values of station terms. Large station terms in the central stable region suggest significantly lower attenuation, probably due to the relative lack of tectonic activity in this region. The ratio of the largest horizontal to the largest vertical component of L/sub g/ shows unexpectedly large regional variations that are important since most damage is generally caused by the horizontal components of ground motion. 53 references, 28 figures, 7 tables.
- Research Organization:
- Teledyne Geotech, Alexandria, VA (USA)
- OSTI ID:
- 5438395
- Report Number(s):
- NUREG/CR-3555; ON: DE84900720
- Resource Relation:
- Other Information: Portions are illegible in microfiche products
- Country of Publication:
- United States
- Language:
- English
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