SEISMIC HAZARD ASSESSMENT OF METROPOLITAN TEHRAN,IRAN

This paper presents a probabilistic seismic hazard assessment of Tehran , the capital of Iran Two maps have been prepared to indicate the earthquake hazard of tehran and its vicinity in the form of iso -acceleration contour lines. They display the probabilistic estimate of Pead Ground Acceleration(PGA) over bedrock for the return periods of 475 and 950 years . tehran is a densely populated metropolotan in which more than 10 milion people live. many destructive earthquakes happened in Iran in the last centuries. It comes from historical references that at least 6 times, tehran has been destroyed by catastrophic earthquakes. the oldest one happened in the 4th century BC. A collected catalogue containing both historical and instrumental events and covering the period from the 4th century BC to 1999 is then used.

Keywords:

Seismic hazard assessment , historiacal earthquakes , seismecity parameters , Tehran , Iran.