PL EN
Estimation of Seismic Kappa Parameter and Near-Surface Attenuation in Morocco
 
Więcej
Ukryj
1
Laboratory of Applied Sciences, National School of Applied Sciences, Abdelmalek Essaadi University, Postal Code, 03, Al Hoceima, Morocco
2
National Center for Seismology, Ministry of Earth Sciences, New Delhi, 110003, India
3
Laboratory of Solid State Physics, Department of Physics, Faculty of Science Dhar El Mahraz, Sidi Mohamed Ben Abdellah University, Fez, Postal Code, 1796, Fez-Atlas, Morocco
4
Laboratory of Engineering Sciences and Applications , National School of Applied Sciences, Abdelmalek Essaadi University, Postal Code, 03, Al Hoceima, Morocco
5
Mechanics and Applied Mathematics Department, Industrial and Seismic Engineering Research Team, National School of Applied Sciences, Mohammed First University, Oujda 60000, Morocco
6
University of Lorraine, ENSG, UMR 7359-GeoRessources, Nancy Cedex, France
7
Earth Science Department, Scientific Institute, Mohamed V University, P.O. Box 1014, Rabat, Morocco
8
Mechanics and Materials Team, Faculty of Science, Mohammed V University, P.O. Box 1014, Rabat, Morocco
AUTOR DO KORESPONDENCJI
Abderrahim Boulanouar   

Laboratory of Applied Sciences, National School of Applied Sciences, Abdelmalek Essaadi University, Postal Code, 03, Al Hoceima, Morocco
 
Ecol. Eng. Environ. Technol. 2022; 6:128–139
 
SŁOWA KLUCZOWE
DZIEDZINY
STRESZCZENIE
The goal of this study is to estimate the kappa (κ) parameter for a group of 12 broadband stations, located in different geological structures in Morocco, a country with moderate seismic activity. In this study, the kappa, κ has been obtained from the spectral analysis of the shear waves of 42 earthquakes, recorded in Morocco. Using 321 seismograms recorded in the period between 2009 and 2012 by the Picasso Project, the average κ-values have been computed from the horizontal components. For each station, the relationship between κ values and the hypocentral distance was determined. We separately investigated and studied the distance dependence of the stations located on soft soil and hard rock sites. The estimated average factor of the κ value ranges from 0.0682 for the hard sites to 0.0763 for the soft sites, with 0.072 as an average value. The lack of a significant correlation found between κ and magnitude at all stations considered in this study suggests that kappa is mainly dependent on local site characteristics. To the best of our knowledge, no studies related to kappa parameter estimation have been published for this region. The results generated in this study can be used for the seismic hazard evaluation of Morocco.