Probabilistic seismic hazard analysis for the city of Quetta, Pakistan

• Autorzy: Rehman S. , Lindholm C. , Ahmed N. , Rafi Z.

Identyfikatory

DOI

10.2478/s11600-013-0186-1

• Języki publikacji: EN

Abstrakty

EN

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.

Słowa kluczowe

EN

seismic hazard; tectonics; faults; recurrence; peak ground acceleration

PL

zagrożenia sejsmiczne; tektonika; zakłócenia; powtarzalność; relacja tłumienia

• Wydawca: Instytut Geofizyki PAN ; Springer
• Czasopismo: Acta Geophysica
• Rocznik: 2014
• Tom: Vol. 62, no. 4
• Strony: 737--761
• Opis fizyczny: Bibliogr. 30 poz.

Twórcy

autor

Rehman S.

• 1National Seismic Monitoring Center, Pakistan Meteorological Department, Islamabad, Pakistan

autor

Lindholm C.

• Norwegian Seismic Array, NORSAR, Kjeller, Norway

autor

Ahmed N.

• Pakistan Meteorological Department, Islamabad, Pakistan

autor

Rafi Z.

• Pakistan Meteorological Department, Islamabad, Pakistan

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