Issue |
E3S Web Conf.
Volume 607, 2025
6th International Conference of GIS USERS (ERRACHIDIA GIS-USERS’2024)
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Article Number | 04004 | |
Number of page(s) | 7 | |
Section | Climate Change-Environment-Natural Hazards | |
DOI | https://doi.org/10.1051/e3sconf/202560704004 | |
Published online | 22 January 2025 |
Vs30 Mapping and Soil Classification in Tiznit Region Based On H/V Spectral Ration Method
1 Mohammed V University in Rabat, Institut Scientifique, GEOPAC Research Center, Geophysics and Natural Hazards Laboratory, Av. Ibn Batouta, B.P 703 Agdal, Rabat, Morocco.
2 Engineering Office IservicePro, Morocco.
* Corresponding author: fadouacherki1@gmail.com
The average shear wave velocity measured to a depth of 30 meters (VS30) is an important parameter for determining soil characteristics. As part of the seismic risk assessment in the Tiznit region, ambient noise recordings were made during the geophysical investigation campaign using the (H/V) method. The spectral analysis of these recordings enabled the determination of dominant frequencies and the estimation of VS30 values for each site. The aim of this study is to map the spatial variation of VS30 and classify soil types in the Tiznit region. The results show that the soil in the study area is divided into two classes according to the National Earthquake Hazards Reduction Program (NEHRP) classification: Class C refers to soft rock and very dense soils with VS30 greater than 360 m/s, while Class D represents stiff soils with VS30 values between 180 m/s and 360 m/s.
Key words: Seismic risk assessment / HVSR / VS30 mapping / Tiznit / soil classification
© The Authors, published by EDP Sciences, 2025
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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