QUICK ESTIMATES OF SOFT SEDIMENT THICKNESSES FROM AMBIENT NOISE HORIZONTAL TO VERTICAL SPECTRAL RATIOS: A CASE STUDY IN SOUTHERN ITALY

VERA DAMICO; MATTEO PICOZZI; DARIO ALBARELLO; GIUSEPPE NASO; SERGIO TROPENSCOVINO

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QUICK ESTIMATES OF SOFT SEDIMENT THICKNESSES FROM AMBIENT NOISE HORIZONTAL TO VERTICAL SPECTRAL RATIOS: A CASE STUDY IN SOUTHERN ITALY

机译：从环境噪声水平到垂直光谱比的软沉积厚度的快速估算：以意大利南部为例

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An approach devoted to quickly assess the thickness of soft sedimentary cover in areas of unknown subsurface morphology is applied in this study. In particular, soil thickness (h) is derived by combining estimates of the resonance frequency (f_r) relative to soft sediments with the local shear-wave velocity (V_s) profile. For this purpose, f_r values are assessed from horizontal to vertical (H/V) spectral ratios of seismic noise recordings and the V_s profile is obtained by considering information from shallow seismic surveys. Results obtained for a Quaternary sedimentary basin in Southern Italy are discussed. Since in the investigated area only weak independent constraints are available, special emphasis is given to the assessment of uncertainties involved in this estimate of soil thickness.

机译：在这项研究中，采用了一种专门用于快速评估未知地下形态区域中软沉积覆盖层厚度的方法。特别是，通过将相对于软质沉积物的共振频率（f_r）的估计值与局部剪切波速度（V_s）曲线相结合，得出土壤厚度（h）。为此，从地震噪声记录的水平到垂直（H / V）频谱比率评估f_r值，并通过考虑来自浅层地震勘测的信息来获得V_s轮廓。讨论了在意大利南部第四纪沉积盆地获得的结果。由于在研究区域中只有弱的独立约束条件可用，因此要特别强调评估土壤厚度估算中涉及的不确定性。

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来源
《Journal of Earthquake Engineering》 |2004年第6期|p.895-908|共14页
作者
VERA DAMICO; MATTEO PICOZZI; DARIO ALBARELLO; GIUSEPPE NASO; SERGIO TROPENSCOVINO;
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作者单位

Department of Earth Sciences, University of Siena via Latcrina 8, Siena, 53100, Italy;

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原文格式 PDF
正文语种 eng
中图分类天文学、地球科学;
关键词
soil thickness; resonance frequency; shear-wave velocity profile; H/V spectral ratios;

机译：土壤厚度;共振频率;剪切波速度剖面;H / V光谱比;

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QUICK ESTIMATES OF SOFT SEDIMENT THICKNESSES FROM AMBIENT NOISE HORIZONTAL TO VERTICAL SPECTRAL RATIOS: A CASE STUDY IN SOUTHERN ITALY

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