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SEISMOTECTONIC AND EARTHQUAKE HAZARD ANALYSIS FOR HAMADAN AREA

AUTHOR/S: RAMAZI, H., HEIDARI, G.,
Sunday 1 August 2010 by Libadmin2004

4th International Scientific Conference - SGEM2004, www.sgem.org, SGEM2004 Conference Proceedings/ ISBN: 954-918181-2, June 14-18, 2004, 171- 180pp

ABSTRACT

This paper is devoted to a seismotectonic study and earthquake hazard assessment
for the Hamadan area. The major faults, active faults and potential seismic sources as
well as the moderate and large earthquakes in the region are identified and illustrated
in a seismotectonic map. The appropriate attenuation laws are selected according to
seismotectonic characteristics of the region and site geology of the area. A model of
the earthquake sources are prepared and earthquake hazard analysis has been done for
the area using an analysis point interval scale of 0.1× 0.1 geographical degrees.
Finally, Iso-acceleration maps have been compiled afterwards for return periods of
50, 200, and 500 years. According to the result of this research, in the region there
are some high active faults. Some of these faults have produced a number of
moderate and destructive earthquakes in the past centuries. Base ob the hazard
analyses, Hamadan area could be divided into VI zones from earthquake hazard point
of view. Earthquake hazard is very high in south-west, medium and low in center,
high in north-western, very low in north-east, and critical around the Nahavand
earthquake fault located in the south-west.

Key words: Earthquake hazard, seismotectonic, seismicity, peak ground
acceleration, seismic macrozonation, Iran, Hamadan.