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Titolo:
Microtremor observations of deep sediment resonance in metropolitan Memphis, Tennessee
Autore:
Bodin, P; Smith, K; Horton, S; Hwang, H;
Indirizzi:
Univ Memphis, CERI, Memphis, TN 38152 USA Univ Memphis Memphis TN USA 38152 iv Memphis, CERI, Memphis, TN 38152 USA
Titolo Testata:
ENGINEERING GEOLOGY
fascicolo: 1-3, volume: 62, anno: 2001,
pagine: 159 - 168
SICI:
0013-7952(200110)62:1-3<159:MOODSR>2.0.ZU;2-N
Fonte:
ISI
Lingua:
ENG
Soggetto:
MISSISSIPPI EMBAYMENT; WAVE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Engineering, Computing & Technology
Citazioni:
25
Recensione:
Indirizzi per estratti:
Indirizzo: Bodin, P Fugro, 5855 Olivas Pk Dr, Ventura, CA 93003 USA Fugro 5855 OlivasPk Dr Ventura CA USA 93003 entura, CA 93003 USA
Citazione:
P. Bodin et al., "Microtremor observations of deep sediment resonance in metropolitan Memphis, Tennessee", ENG GEOL, 62(1-3), 2001, pp. 159-168

Abstract

We measured site resonance periods throughout metropolitan Memphis, Tennessee. The site-resonance was derived from recordings of ambient 'microtremor' and is a direct measurement of seismic ground shaking. In the Memphis metropolitan area, the period, T-0 (in s) is predicted by the empirical relation T-0 = -0.39899 + 7.8922 x 10(-3)H - 3.0634 x 10(-6)H(2), [350 < H < 1100m], where H is the thickness (in m) of the unconsolidated sediments that overly hard Paleozoic rocks. Assuming that a quarter-wavelength relationshipgoverns the relationship between resonant period, sediment thickness, and average shear wave speed, we estimate the average shear wave speed of unconsolidated sediments as a function of sediment thicknesses: Vs = 521.15 + 0.37459H [350 < H < 1100 m]. The scatter in the observations, and discordancewith earlier work suggests that caution is warranted in applying these values of wave speed indiscriminately to sites in the absence of further detailed work. (C) 2001 Published by Elsevier Science B.V.

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Documento generato il 10/07/20 alle ore 09:49:32