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Discussion papers
https://doi.org/10.5194/nhess-2019-299
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/nhess-2019-299
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Submitted as: research article 26 Nov 2019

Submitted as: research article | 26 Nov 2019

Review status
This discussion paper is a preprint. It is a manuscript under review for the journal Natural Hazards and Earth System Sciences (NHESS).

Seismic hazard maps of Peshawar district for various return periods

Khalid Mahmood1, Usman Khan1, Qaiser Iqbal1, and Naveed Ahmad2 Khalid Mahmood et al.
  • 1Department of Civil Engineering, Sarhad University of Science and Information Technology, Peshawar, Pakistan
  • 2Department of Civil Engineering, University of Engineering and Technology, Peshawar, Pakistan

Abstract. The probabilistic seismic hazard analysis of Peshawar District has been conducted in for a grid size of 0.01. The seismic sources for the target location are defined as the area polygon with uniform seismicity for which, the earthquake catalogues were obtained from different worldwide seismological network data. The earthquake catalogues obtained in different magnitude scale was converted into moment magnitude using regression analysis. The homogenized catalogue was then further subdivided into shallow crustal and deep subduction zone earthquake events for which, the seismic source parameters were obtained using Bounded Gutenberg-Richter Recurrence law. The seismic hazard maps were prepared in term of PGA at bedrock using the different ground motion attenuation relationships. The study shows that; the selection of appropriate ground motion prediction equation is an important factor in deciding the seismic hazard of Peshawar District. The inclusion of deep subduction earthquake does not add significantly to the seismic hazard. The calculated seismic hazard map for shallow crustal earthquake after including the epistemic uncertainty was in close agreement to that developed by BCP-2007 for a return period of 475 years on bedrock. The seismic hazard maps for other return periods i.e., 50, 100, 250, 475 and 2500 years were then prepared.

Khalid Mahmood et al.
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Short summary
The paper presents probabilistic based seismic hazard maps prepared for Peshawar for various return periods using classical PSHA. The study considered both shallow and deep earthquakes, represented by area sources, while using the recent ground motion prediction equations. The hazard map for 475 year return period was compared with the hazard map given in the Building Code of Pakistan, which was found in close agreement. The obtained maps may be used for infrastructures' risk assessment.
The paper presents probabilistic based seismic hazard maps prepared for Peshawar for various...
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