Attenuation of seismic coda waves in the Rif area, northern Morocco

Attenuation of seismic coda waves in the Rif area, northern Morocco

15 pages, 12 figures, 5 tables, supplementary data https://doi.org/10.1016/j.jafrearsci.2020.103815

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Bibliographic Details
Main Authors: Arab, Oussama, Azguet, Roumaissae, Ouchen, Ibrahim, El Fellah, Younes, Harnafi, M., Sebbani, J., Villaseñor, Antonio
Other Authors: Université Mohammed V de Rabat
Format: artículo biblioteca
Published: Elsevier 2020-05
Subjects:Attenuation, Rif region, Seismic signal, Coda waves, Quality factor, Morocco,
Online Access:http://hdl.handle.net/10261/206781
http://dx.doi.org/10.13039/501100011033
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spelling dig-icm-es-10261-2067812021-04-29T06:41:36Z Attenuation of seismic coda waves in the Rif area, northern Morocco Arab, Oussama Azguet, Roumaissae Ouchen, Ibrahim El Fellah, Younes Harnafi, M. Sebbani, J. Villaseñor, Antonio Université Mohammed V de Rabat Agencia Estatal de Investigación (España) Attenuation Rif region Seismic signal Coda waves Quality factor Morocco 15 pages, 12 figures, 5 tables, supplementary data https://doi.org/10.1016/j.jafrearsci.2020.103815 The northern morocco, precisely the Rif region has known moderate tectonic activities in the last years (Al Houceima earthquakes 1994, 2004 and 2016). The aim of this work is to investigate the variety of tectonic activity by using the attenuation scattering of coda waves and its dependency with the frequency. The illustrated case in this work implies 70 seismic events focusing on the Rif Mountains with recorded seismic data during all 2014 period. These recordings have been used with a magnitude (Ml) less than 5. In this work we utilized 15 broadband stations deployed in a surface area defined by longitudes 34°N to 35.50°N and latitude 5.3°W and 3.20°W. The quality factor is inversely proportional to the seismic attenuation which is defined by the backscattering model (Aki and Chouet, 1975). The quality factor estimated values were computed at different central band frequencies that start from 1.5 till 18 Hz for five lapse time windows 20, 30, 40, 50 and 60 s. For 20s window lapse time, the quality factor average for the whole study area gives estimation of about 83.55 ± 10.84 at 1.5 Hz and 491.66 ± 150.07 at 18 Hz, as well as the estimation for 60s window lapse time is about 157.49 ± 15.61 at 1.5 Hz and 1787.65 ± 807.88 at 18 Hz central band frequencies. We find that the quality factor rise when both frequency and lapse time window increase; which reveals a clear dependency between the quality factor and frequency and reflects heterogeneities within the underlying crust and the complexity of geological/geophysical pattern in this zone This study was supported by the Scientific Institute, Rabat, Morocco With the funding support of the ‘Severo Ochoa Centre of Excellence’ accreditation (CEX2019-000928-S), of the Spanish Research Agency (AEI) 2020-04-07T08:38:49Z 2020-04-07T08:38:49Z 2020-05 2020-04-07T08:38:50Z artículo http://purl.org/coar/resource_type/c_6501 issn: 1464-343X e-issn: 1879-1956 Journal of African Earth Sciences 165: 103815 (2020) CEX2019-000928-S http://hdl.handle.net/10261/206781 10.1016/j.jafrearsci.2020.103815 http://dx.doi.org/10.13039/501100011033 https://doi.org/10.1016/j.jafrearsci.2020.103815 Sí none Elsevier
institution ICM ES
collection DSpace
country España
countrycode ES
component Bibliográfico
access En linea
databasecode dig-icm-es
tag biblioteca
region Europa del Sur
libraryname Biblioteca del ICM España
topic Attenuation
Rif region
Seismic signal
Coda waves
Quality factor
Morocco
Attenuation
Rif region
Seismic signal
Coda waves
Quality factor
Morocco
spellingShingle Attenuation
Rif region
Seismic signal
Coda waves
Quality factor
Morocco
Attenuation
Rif region
Seismic signal
Coda waves
Quality factor
Morocco
Arab, Oussama
Azguet, Roumaissae
Ouchen, Ibrahim
El Fellah, Younes
Harnafi, M.
Sebbani, J.
Villaseñor, Antonio
Attenuation of seismic coda waves in the Rif area, northern Morocco
description 15 pages, 12 figures, 5 tables, supplementary data https://doi.org/10.1016/j.jafrearsci.2020.103815
author2 Université Mohammed V de Rabat
author_facet Université Mohammed V de Rabat
Arab, Oussama
Azguet, Roumaissae
Ouchen, Ibrahim
El Fellah, Younes
Harnafi, M.
Sebbani, J.
Villaseñor, Antonio
format artículo
topic_facet Attenuation
Rif region
Seismic signal
Coda waves
Quality factor
Morocco
author Arab, Oussama
Azguet, Roumaissae
Ouchen, Ibrahim
El Fellah, Younes
Harnafi, M.
Sebbani, J.
Villaseñor, Antonio
author_sort Arab, Oussama
title Attenuation of seismic coda waves in the Rif area, northern Morocco
title_short Attenuation of seismic coda waves in the Rif area, northern Morocco
title_full Attenuation of seismic coda waves in the Rif area, northern Morocco
title_fullStr Attenuation of seismic coda waves in the Rif area, northern Morocco
title_full_unstemmed Attenuation of seismic coda waves in the Rif area, northern Morocco
title_sort attenuation of seismic coda waves in the rif area, northern morocco
publisher Elsevier
publishDate 2020-05
url http://hdl.handle.net/10261/206781
http://dx.doi.org/10.13039/501100011033
work_keys_str_mv AT araboussama attenuationofseismiccodawavesintherifareanorthernmorocco
AT azguetroumaissae attenuationofseismiccodawavesintherifareanorthernmorocco
AT ouchenibrahim attenuationofseismiccodawavesintherifareanorthernmorocco
AT elfellahyounes attenuationofseismiccodawavesintherifareanorthernmorocco
AT harnafim attenuationofseismiccodawavesintherifareanorthernmorocco
AT sebbanij attenuationofseismiccodawavesintherifareanorthernmorocco
AT villasenorantonio attenuationofseismiccodawavesintherifareanorthernmorocco
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