Abstract
In this study the results of PSHA deaggregation for 5%-damped 0.2, 0.5, 2 and 4 s spectral accelerations, corresponding to Mean Return Periods (MRPs) of 50 and 475 yr for Karaj city was presented. The aim of this paper is to quantify the dominant events that have the most contribution on ground-motion exceedance from the above mentioned hazard levels. The scenario earthquakes are characterized by bins of Magnitude (M) and source-to-site distance (R). The results reveal that for Karaj city, the hazard is mainly controlled by near active fault.
Highlights
Iran is one of the most seismic active countries in the world
The major aim of this study is the deaggregation of the hazard results in terms of magnitude, distance and epsilon, to investigate earthquake occurrences that have the most contribution to the resulting ground-motion hazard in Karaj
PSHA was evaluated in order to perform seismic hazard deaggregation for Karaj city
Summary
Iran is one of the most seismic active countries in the world. During the 1990 Rudbar earthquake (Mw = 7.3) in northwest Iran, more than 40,000 people lost their lives, more than 500,000 became homeless, nearly 100,000 buildings were destroyed, three cities and 700 villages were demolished. Iran has been host to a long series of large damaging earthquakes, many of them occurring within the 20th century. There have been roughly 126,000 deaths attributed to 14 earthquakes of magnitude ~7.0 (one 7.0 earthquake/7yr) and 51 earthquakes of 6.0-6.9 (one/2-yr) that have occurred in Iran since 1900. During this period nine (9) cities were devastated (one city/1 O-yr). Alborz and Khorasan seismic regions are among the most seismically active regions of the country
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