Shallow S-Wave Velocity Structure in the Middle-Chelif Basin, Algeria, Using Ambient Vibration Single-Station and Array Measurements

In order to better assess the seismic hazard in the northern region of Algeria, the shear-wave velocity structure in the Middle-Chelif Basin is estimated using ambient vibration single-station and array measurements. The Middle-Chelif Basin is located in the central part of the Chelif Basin, the lar...

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Autores principales:	Abdelouahab Issaadi, Fethi Semmane, Abdelkrim Yelles-Chaouche, Juan José Galiana-Merino, Anis Mazari
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	Middle-Chelif sedimentary basin HVSR array measurement frequency–wavenumber (F–K) method Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/8bb08b32a9ef4ca2ba3883f019ef23e4
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id	oai:doaj.org-article:8bb08b32a9ef4ca2ba3883f019ef23e4
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spelling	oai:doaj.org-article:8bb08b32a9ef4ca2ba3883f019ef23e42021-11-25T16:43:28ZShallow S-Wave Velocity Structure in the Middle-Chelif Basin, Algeria, Using Ambient Vibration Single-Station and Array Measurements10.3390/app1122110582076-3417https://doaj.org/article/8bb08b32a9ef4ca2ba3883f019ef23e42021-11-01T00:00:00Zhttps://www.mdpi.com/2076-3417/11/22/11058https://doaj.org/toc/2076-3417In order to better assess the seismic hazard in the northern region of Algeria, the shear-wave velocity structure in the Middle-Chelif Basin is estimated using ambient vibration single-station and array measurements. The Middle-Chelif Basin is located in the central part of the Chelif Basin, the largest of the Neogene sedimentary basins in northern Algeria. This basin hosts the El-Asnam fault, one of the most important active faults in the Mediterranean area. In this seismically active region, most towns and villages are built on large unconsolidated sedimentary covers. Application of the horizontal-to-vertical spectral ratio (HVSR) technique at 164 sites, and frequency–wavenumber (F–K) analysis at 7 other sites, allowed for the estimation of the ground resonance frequencies, shear-wave velocity profiles, and sedimentary cover thicknesses. The electrical resistivity tomography method was used at some sites to further constrain the thickness of the superficial sedimentary layers. The soil resonance frequencies range from 0.75 Hz to 12 Hz and the maximum frequency peak amplitude is 6.2. The structure of the estimated shear-wave velocities is presented in some places as 2D profiles to help interpret the existing faults. The ambient vibration data allowed us to estimate the maximum depth in the Middle-Chelif Basin, which is 760 m near the city of El-Abadia.Abdelouahab IssaadiFethi SemmaneAbdelkrim Yelles-ChaoucheJuan José Galiana-MerinoAnis MazariMDPI AGarticleMiddle-Chelif sedimentary basinHVSRarray measurementfrequency–wavenumber (F–K) methodTechnologyTEngineering (General). Civil engineering (General)TA1-2040Biology (General)QH301-705.5PhysicsQC1-999ChemistryQD1-999ENApplied Sciences, Vol 11, Iss 11058, p 11058 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Middle-Chelif sedimentary basin HVSR array measurement frequency–wavenumber (F–K) method Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999
spellingShingle	Middle-Chelif sedimentary basin HVSR array measurement frequency–wavenumber (F–K) method Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999 Abdelouahab Issaadi Fethi Semmane Abdelkrim Yelles-Chaouche Juan José Galiana-Merino Anis Mazari Shallow S-Wave Velocity Structure in the Middle-Chelif Basin, Algeria, Using Ambient Vibration Single-Station and Array Measurements
description	In order to better assess the seismic hazard in the northern region of Algeria, the shear-wave velocity structure in the Middle-Chelif Basin is estimated using ambient vibration single-station and array measurements. The Middle-Chelif Basin is located in the central part of the Chelif Basin, the largest of the Neogene sedimentary basins in northern Algeria. This basin hosts the El-Asnam fault, one of the most important active faults in the Mediterranean area. In this seismically active region, most towns and villages are built on large unconsolidated sedimentary covers. Application of the horizontal-to-vertical spectral ratio (HVSR) technique at 164 sites, and frequency–wavenumber (F–K) analysis at 7 other sites, allowed for the estimation of the ground resonance frequencies, shear-wave velocity profiles, and sedimentary cover thicknesses. The electrical resistivity tomography method was used at some sites to further constrain the thickness of the superficial sedimentary layers. The soil resonance frequencies range from 0.75 Hz to 12 Hz and the maximum frequency peak amplitude is 6.2. The structure of the estimated shear-wave velocities is presented in some places as 2D profiles to help interpret the existing faults. The ambient vibration data allowed us to estimate the maximum depth in the Middle-Chelif Basin, which is 760 m near the city of El-Abadia.
format	article
author	Abdelouahab Issaadi Fethi Semmane Abdelkrim Yelles-Chaouche Juan José Galiana-Merino Anis Mazari
author_facet	Abdelouahab Issaadi Fethi Semmane Abdelkrim Yelles-Chaouche Juan José Galiana-Merino Anis Mazari
author_sort	Abdelouahab Issaadi
title	Shallow S-Wave Velocity Structure in the Middle-Chelif Basin, Algeria, Using Ambient Vibration Single-Station and Array Measurements
title_short	Shallow S-Wave Velocity Structure in the Middle-Chelif Basin, Algeria, Using Ambient Vibration Single-Station and Array Measurements
title_full	Shallow S-Wave Velocity Structure in the Middle-Chelif Basin, Algeria, Using Ambient Vibration Single-Station and Array Measurements
title_fullStr	Shallow S-Wave Velocity Structure in the Middle-Chelif Basin, Algeria, Using Ambient Vibration Single-Station and Array Measurements
title_full_unstemmed	Shallow S-Wave Velocity Structure in the Middle-Chelif Basin, Algeria, Using Ambient Vibration Single-Station and Array Measurements
title_sort	shallow s-wave velocity structure in the middle-chelif basin, algeria, using ambient vibration single-station and array measurements
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/8bb08b32a9ef4ca2ba3883f019ef23e4
work_keys_str_mv	AT abdelouahabissaadi shallowswavevelocitystructureinthemiddlechelifbasinalgeriausingambientvibrationsinglestationandarraymeasurements AT fethisemmane shallowswavevelocitystructureinthemiddlechelifbasinalgeriausingambientvibrationsinglestationandarraymeasurements AT abdelkrimyelleschaouche shallowswavevelocitystructureinthemiddlechelifbasinalgeriausingambientvibrationsinglestationandarraymeasurements AT juanjosegalianamerino shallowswavevelocitystructureinthemiddlechelifbasinalgeriausingambientvibrationsinglestationandarraymeasurements AT anismazari shallowswavevelocitystructureinthemiddlechelifbasinalgeriausingambientvibrationsinglestationandarraymeasurements
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Shallow S-Wave Velocity Structure in the Middle-Chelif Basin, Algeria, Using Ambient Vibration Single-Station and Array Measurements

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