Evaluation of seismic hazard using tectonic fault data: case of Beni-Chougrane Mountains (Western Algeria)

• Autorzy: Refas Soraya , Safa Aissa , Zaagane Mansour , Souidi Zahera , Hamimed Abderahmane

Identyfikatory

DOI

10.5277/Msc192609

• Języki publikacji: EN

Abstrakty

EN

In the world, people are increasingly exposed to natural hazards such as earthquakes. To this end, seismic risk mapping remains an essential topic of study in order to minimize their destructive effects. These maps are needed for both seismic risk management and for the design of infrastructure. The challenge is to take into account local information provided by seismic sources (historical seismicity) as well as information related to active tectonic faults. In this article, we calculated the seismic risk in the Mascara Mountains (western Algeria) using the geometric characteristic of known faults. This study is based on an important collection of a tectonic database of these faults (Nature, geometry and geological context). This information is relevant for their seismic potential. Indeed, by including these formations we tried to compute the seismic risk this region characterized by weak seismicity. Our results show more or less alarming facts. Indeed, the magnitude values calculated are between 4.85 and 7.25, whereas the magnitudes obtained by experimental seismicity do not exceed 6 on the Richter scale. The values of the maximum ground acceleration (PGA) are between 0.03 and 0.28 g. These results were compared with assessments made on the basis of historical seismicity; the maximum values obtained do not exceed 0.2 g. The higher values of magnitude calculated from the active faults is due to: (i) the nature of the faults (inverse, normal and strike slip), (ii) the geometry (length and depth) and (iii) that some of these faults may have an aseismic character.

Słowa kluczowe

EN

earthquake; magnitude; peak ground acceleration; active fault; Mascara region

• Wydawca: Wydział Geoinżynierii, Górnictwa i Geologii, Instytut Górnictwa Politechniki Wrocławskiej
• Czasopismo: Mining Science
• Rocznik: 2019
• Tom: Vol. 26
• Strony: 123--145
• Opis fizyczny: Bibliogr. 58 poz., rys., tab.

Twórcy

autor

Refas Soraya

• Research Laboratory of Biological Systems and Geomatics (LRSBG), University of Mascara, Mascara, Algeria

autor

Safa Aissa

• Laboratory of Hydrogeology, Mohamed Ben Ahmed, University,Oran-2, Oran, Algeria

autor

Zaagane Mansour

• Research Laboratory of Biological Systems and Geomatics (LRSBG), University of Mascara, Mascara, Algeria

autor

Souidi Zahera

• Research Laboratory of Biological Systems and Geomatics (LRSBG), University of Mascara, Mascara, Algeria

autor

Hamimed Abderahmane

• Research Laboratory of Biological Systems and Geomatics (LRSBG), University of Mascara, Mascara, Algeria

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