Seismic Hazard Analysis of Golsar district in Rasht Metropolis.

Document Type : Original Manuscript


1 Department of Civil Engineering, Islamic Azad University, Germi, Iran

2 Department of Civil Engineering, Payame Noor University, Tehran, Iran


Golsar is located in north-west of Rasht the capital city of Guilan province. This region, according to standards 2800, is identified among the regions with relatively high risk of earthquake. A set of historical and instrumental seismicity data used in radius of 200 km which covers the period twelveth century until now. Kijko method has been applied for estimating for parameters considering of the available information. Estimating the peak ground acceleration on Bedrock (PGA) with five different attenuation relationship, with a probability of occurrence of 10% in 50 years, is 0.31g in Galsar Rasht region. Meanwhile in order to determine the seismic spectra based on weighed attenuation spectral relations, and also for the reason of being spectral and more suitable with the condition of the zone were used. The horizontal spectral acceleration in the 0.3 second period has the highest value for 2% and 10% probability of occurrence. The earthquake hazard in Golsar zone was calculated using SEISRISK III (1987) software.


 [1] Akkar S, Bommer J.J. 2010. Empirical equation for
the prediction of PGA, PGV and spectral
accelerations in Europe, the Mediterranean region
and the Middle East. Seismological Research
Letters, 81(2), 195-206.
[2] Ambraseys NN, Melville CP.1982. A History of
Persian Earthquakes, Cambridge University Press,
Cambridge, Britain.
[3] Ambraseys NN, Simpson KA, Bommer JJ. 1996.
Prediction horizontal response spectra in Europe.
Earthquake Engineering and Structural Dynamics.
Vol. 25, pp. 371-400.
[4] Bender B, Perkins DM . 1987. SEISRISK-ІІІ : A
computer program for seismic hazard estimation,
U.S. Geological Survey, Bulletin 1772.
[5] Berge-Thierry C, Cotton F, Scotti O, Anne D,
Pommera G, Fukushima, Y. 2003. New empirical
response spectral attenuation laws for moderate
European earthquakes. Journal of Earthquake
Engineering, 7: 193-222.
[6] BHRC. Iranian Code of Practice for Seismic
Resistant Design of Building, Standard
No.2800.2013. Fourth Revision, Building and
Housing Research Center, Tehran, Iran, pp. 876—
[7] Fekri Kateh sari F.2015. Seismic Hazard Analysis of
Golsar district in Rasht Metropolis. M.Sc. thesis,
Azad University of Germi, Supervised by Dr.
Razavian Amrei & Seyed Hashemi.
[8] Gardaner JK, Knopoff L. 1974. Is the sequence of
earthquake in southern California, with aftershocks
removed, poissonian? , Bulletin of the Seismological
Society of America ,Vol.64, No.5, 1363-1367.
[9] Ghodrati Amiri G, Mahdavian A, Manouchehri
Dana F.2007. Attenuation Relationship for Iran ,
Journal of Earthquake Engineering, Vol. 11, Issue 4,
pp. 469-492.
[10] Ghodrati Amiri G, Khorasani M, MirzaHesabi R &
RazavianAmrei Sa. 2010. Ground-Motion Prediction
Equations of Spectral Ordinates and Arias Intensity
for Iran. Journal of Earthquake Engineering, Vol.14,
Issue 1, pp:1-29.
[11] Green AR, Hall WJ. 1994. An overview of selected
seismic hazard analysis methodologies, A Report on a
Research Project, Department of Civil Engineering,
University of Illinois at Urbana-Champaign.
[12] Hesaami Azar Kh, 2003. Active faults in Iran,
International Institute of Earthquake Engineering and
[13] IIEES. Seismic Rehabilitation Code for Existing
Buildings in Iran, International Institute ofEarthquake
Engineering and Seismology(journal 360). 2002.
Tehran, Iran.
[14] International Institute of Earthquake Engineering and
Seismology website:, 2015.
[15] IRCOLD, Iranian Committee of Large Dams. 1994.
Relationship between Ms and mb, Internal Report.
[16] Kijko A. 2000. Statical Estimation of Peak Regional
Earthquake Magnitude Mmax, Workshop of
Seismicity Modeling in Seismic Hazard Mapping,
poljce, Slovenia, May, 22-24.
[17] Nowroozi. 1985. Empirical relations between
magnitude and fault parameters for earthquakes in
Iran, Bulletin of the Seismological Society of
America ,Vol. 75, No. 5, pp. 1327-1338.