Probabilistic Seismic Hazard Assessment of Babol, Iran
This paper presents a probabilistic seismic hazard assessment of Babol, one of big cities in north of Iran. Many destructive earthquakes happened in Iran in the last centuries. It comes from historical references that at least many times; Babol has been destroyed by catastrophic earthquakes. In this...
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Babol Noshirvani University of Technology
2011-01-01
|
| Series: | Iranica Journal of Energy and Environment |
| Subjects: | |
| Online Access: | http://www.ijee.net/Journal/IJEE/Vol2/No3/12.pdf |
| _version_ | 1827296327566884864 |
|---|---|
| author | Gholamreza Abdollahzadeh Mohsen Shahaky |
| author_facet | Gholamreza Abdollahzadeh Mohsen Shahaky |
| author_sort | Gholamreza Abdollahzadeh |
| collection | DOAJ |
| description | This paper presents a probabilistic seismic hazard assessment of Babol, one of big cities in north of Iran. Many destructive earthquakes happened in Iran in the last centuries. It comes from historical references that at least many times; Babol has been destroyed by catastrophic earthquakes. In this paper, the peak horizontal ground acceleration over the bedrock (PGA) is calculated by a probabilistic seismic hazard assessment (PSHA). For this reason, at first, a collected catalogue, containing both historical and instrumental events that occurred in a radius of 200 km of Babol city and covering the period from 874 to 2004 have been gathered. Then, seismic sources are modeled and recur¬rence relationship is established. After elimination of the aftershocks and foreshocks, the main earthquakes were taken into consideration to calculate the seismic parameters (SP) by Kijko method. The calculations were performed using the logic tree method and four weighted attenuation relationships Ghodrati, 0.35, Khademi, 0.25, Ambraseys and Simpson, 0.2, and Sarma and Srbulov, 0.2. Seismic hazard assessment is then carried out for 8 horizontal by 7 vertical lines grid points using SEISRISK III. Finally, two seismic hazard maps of the studied area based on Peak Horizontal Ground Acceleration (PGA) over bedrock for 2 and 10% probability of ex¬ceedance in one life cycles of 50 year are presented. These calculations have been performed by the Poisson distribution of two hazard levels. The results showed that the PGA ranges from 0.32 to 0.33 g for a return period of 475 years and from 0.507 to 0.527 g for a return period of 2475 years. Since population is very dense in Babol and vulnerability of buildings is high, the risk of future earthquakes will be very significant. |
| first_indexed | 2024-04-24T14:37:01Z |
| format | Article |
| id | doaj.art-03c0d53ec5604039b3312722f38356a9 |
| institution | Directory Open Access Journal |
| issn | 2079-2115 2079-2123 |
| language | English |
| last_indexed | 2024-04-24T14:37:01Z |
| publishDate | 2011-01-01 |
| publisher | Babol Noshirvani University of Technology |
| record_format | Article |
| series | Iranica Journal of Energy and Environment |
| spelling | doaj.art-03c0d53ec5604039b3312722f38356a92024-04-02T23:28:59ZengBabol Noshirvani University of TechnologyIranica Journal of Energy and Environment2079-21152079-21232011-01-0123274285Probabilistic Seismic Hazard Assessment of Babol, IranGholamreza AbdollahzadehMohsen ShahakyThis paper presents a probabilistic seismic hazard assessment of Babol, one of big cities in north of Iran. Many destructive earthquakes happened in Iran in the last centuries. It comes from historical references that at least many times; Babol has been destroyed by catastrophic earthquakes. In this paper, the peak horizontal ground acceleration over the bedrock (PGA) is calculated by a probabilistic seismic hazard assessment (PSHA). For this reason, at first, a collected catalogue, containing both historical and instrumental events that occurred in a radius of 200 km of Babol city and covering the period from 874 to 2004 have been gathered. Then, seismic sources are modeled and recur¬rence relationship is established. After elimination of the aftershocks and foreshocks, the main earthquakes were taken into consideration to calculate the seismic parameters (SP) by Kijko method. The calculations were performed using the logic tree method and four weighted attenuation relationships Ghodrati, 0.35, Khademi, 0.25, Ambraseys and Simpson, 0.2, and Sarma and Srbulov, 0.2. Seismic hazard assessment is then carried out for 8 horizontal by 7 vertical lines grid points using SEISRISK III. Finally, two seismic hazard maps of the studied area based on Peak Horizontal Ground Acceleration (PGA) over bedrock for 2 and 10% probability of ex¬ceedance in one life cycles of 50 year are presented. These calculations have been performed by the Poisson distribution of two hazard levels. The results showed that the PGA ranges from 0.32 to 0.33 g for a return period of 475 years and from 0.507 to 0.527 g for a return period of 2475 years. Since population is very dense in Babol and vulnerability of buildings is high, the risk of future earthquakes will be very significant.http://www.ijee.net/Journal/IJEE/Vol2/No3/12.pdfHistorical earthquakesProbabilistic seismicHazard assessmentUniform hazard spectra |
| spellingShingle | Gholamreza Abdollahzadeh Mohsen Shahaky Probabilistic Seismic Hazard Assessment of Babol, Iran Iranica Journal of Energy and Environment Historical earthquakes Probabilistic seismic Hazard assessment Uniform hazard spectra |
| title | Probabilistic Seismic Hazard Assessment of Babol, Iran |
| title_full | Probabilistic Seismic Hazard Assessment of Babol, Iran |
| title_fullStr | Probabilistic Seismic Hazard Assessment of Babol, Iran |
| title_full_unstemmed | Probabilistic Seismic Hazard Assessment of Babol, Iran |
| title_short | Probabilistic Seismic Hazard Assessment of Babol, Iran |
| title_sort | probabilistic seismic hazard assessment of babol iran |
| topic | Historical earthquakes Probabilistic seismic Hazard assessment Uniform hazard spectra |
| url | http://www.ijee.net/Journal/IJEE/Vol2/No3/12.pdf |
| work_keys_str_mv | AT gholamrezaabdollahzadeh probabilisticseismichazardassessmentofbaboliran AT mohsenshahaky probabilisticseismichazardassessmentofbaboliran |