Journal : Acta Geophysica
Article : Probabilistic seismic hazard analysis for the city of Quetta, Pakistan

Authors :
Tsoulis, D.
Department of Geodesy and Surveying, Aristotle University of Thessaloniki, Thessaloniki, Greece,,
Patlakis, K.
Department of Geodesy and Surveying, Aristotle University of Thessaloniki, Thessaloniki, Greece,
Ansari, A.
Department of Applied Geophysics, Indian School of Mines, Dhanbad, India,
Khan, P.
Department of Applied Geophysics, Indian School of Mines, Dhanbad, India,,
Rehman, S.
1National Seismic Monitoring Center, Pakistan Meteorological Department, Islamabad, Pakistan,,
Lindholm, C.
Norwegian Seismic Array, NORSAR, Kjeller, Norway,
Ahmed, N.
Pakistan Meteorological Department, Islamabad, Pakistan,
Rafi, Z.
Pakistan Meteorological Department, Islamabad, Pakistan,
Abstract : Seismic hazard assessment for Quetta is carried out using probabilistic seismic hazard analysis technique based on area sources and augmented by line source used for the first time in Pakistan. Seismic data has been collected and analyzed in spatial and temporal domains. Five Seismic Zones have been modeled in line with tectonics of the region with b-value of 1.14 using regression. The b-value is slightly higher, which is attributed to the fact that aftershocks were not removed as it distorted the dataset. Five fault sources are modeled, with three as reverse and two as strike-slip with 7.8 as maximum magnitude. Mach Structure is included in the tectonics for the first time. The attenuation relation used in the present study is recommended by various researchers. The expected Peak Ground Acceleration for 500-year return period is 4.79 m/s2 for rock outcrop and characterized as very high. Furthermore, variation in spectral acceleration within Quetta city is observed, for which spectral curves are developed for four different places.

Keywords : zagrożenia sejsmiczne, tektonika, zakłócenia, powtarzalność, relacja tłumienia, seismic hazard, tectonics, faults, recurrence, peak ground acceleration,
Publishing house : Instytut Geofizyki PAN
Publication date : 2014
Number : Vol. 62, no. 4
Page : 737 – 761

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Qute : Tsoulis, D. ,Patlakis, K. ,Ansari, A. ,Khan, P. ,Rehman, S. ,Lindholm, C. ,Ahmed, N. ,Rafi, Z. ,Rafi, Z. , Probabilistic seismic hazard analysis for the city of Quetta, Pakistan. Acta Geophysica Vol. 62, no. 4/2014