Journal cover Journal topic
Natural Hazards and Earth System Sciences An interactive open-access journal of the European Geosciences Union
https://doi.org/10.5194/nhess-2016-370
© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.
Research article
30 Nov 2016
Review status
This discussion paper is a preprint. It has been under review for the journal Natural Hazards and Earth System Sciences (NHESS). A final paper in NHESS is not foreseen.
The analysis of H/V curve from different ellipticity retrieval technique for a single 3c-station recording
Irfan Ullah and Renato Luiz Prado Departamento de Geofísica do Instituto de Astronomia, Geofísica e Ciências Atmosféricas Rua do Matão, 1226 – Cidade Universitária São Paulo-SP – Brasil
Abstract. In the last two decades or so the H/V (Horizontal-to-Vertical Spectral Ratio) technique remained very popular, and are extensively used for the site fundamental frequency estimation. H/V curve are also used with dispersion curve to jointly invert and retrieved the shear wave velocity of relatively deep soil deposit. Although a full theoretical explanation of H/V technique is not been presented yet, There are two main assumptions used generally that H/V curves can be explained by considering Rayleigh wave of noise wavefield only while the other newly presented approach utilized the whole noise wavefield known as diffuse field approach (DFA), However in case of Rayleigh wave approach for H/V, it is almost impossible to the remove the fraction of Love wave to the horizontal component of H/V. Here in this study, we aim to test different approaches adopted for the removal of Love wave fraction from the horizontal component for a borehole test site at the University of Sao Paulo. The result from different approaches is compared with borehole ellipticity curve. The result shows that around the fundamental frequency of curve obtained in either way(DFA or ellipticity approach) is dominated by Rayleigh waves.

Citation: Ullah, I. and Prado, R. L.: The analysis of H/V curve from different ellipticity retrieval technique for a single 3c-station recording, Nat. Hazards Earth Syst. Sci. Discuss., https://doi.org/10.5194/nhess-2016-370, 2016.
Irfan Ullah and Renato Luiz Prado
Interactive discussionStatus: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
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RC1: 'Review', Anonymous Referee #1, 26 Dec 2016 Printer-friendly Version 
AC1: 'Response to the comments', Irfan Ullah, 26 Dec 2016 Printer-friendly Version Supplement 
 
RC2: 'Review of the manuscript NHESS_2016_370', Anonymous Referee #2, 30 Jan 2017 Printer-friendly Version Supplement 
AC2: 'Response to reviewer 2', Irfan Ullah, 31 Jan 2017 Printer-friendly Version Supplement 
Irfan Ullah and Renato Luiz Prado
Irfan Ullah and Renato Luiz Prado

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Short summary
The destruction cause by an earthquake at site depends on the source, propagation path and the effect of soft soil on the seismic motion.The soil effect are find out by two parametesr, shear wave velocity and the fundamental frequency (f) of site.To obtain shear wave velocity of deep soil deposit two technique are combined H/V and dispersion curve. The H/V curve contained some unwanted seismic waves,which lead to error. Here we want to remove that unwanted part of H/V curve by various techniques.
The destruction cause by an earthquake at site depends on the source, propagation path and the...
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