Investigation of the use of slip rate on time-independent seismic hazard macrozonation of Kerman region, west of Lut Block

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Dehghan Manshadi Seyed Hadi; MIRZAEI NOORBAKHSH; ESKANDARI GHADI MORTEZA; SHABANI ELHAM

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Journal: IRANIAN JOURNAL OF GEOPHYSICS Year:2017 | Volume:11 | Issue:2 Page(s): 36-62

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Information Journal Paper

Title

Investigation of the use of slip rate on time-independent seismic hazard macrozonation of Kerman region, west of Lut Block

Author(s)

Dehghan Manshadi Seyed Hadi | MIRZAEI NOORBAKHSH | ESKANDARI GHADI MORTEZA | SHABANI ELHAM | Issue Writer Certificate

Keywords

KermanQ1

spatial distribution function (SDF)Q1

time-independent seismic hazard assessmentQ1

slip rateQ1

spectral acceleration (SA)Q2

Abstract

Presently, seismic hazard assessment (SHA) is highly conducive to seismic-resistant building designs and seismic hazard assessment (SHA) is highly conducive to seismic-resistant building designs and seismic regulations. Seismic hazard maps and other seismic hazard products such as spectral acceleration (SA) are prerequisites for the preparation of building codes and earthquake risk mitigation plans, which are used in making public decisions and policy. Therefore, it is indispensable to use the best available data and methods in SHA. In cases of incomplete historical records like Iran, and in intracontinental areas like Central-East Iran, where fracture boundaries interact slowly, large earthquakes may recur every 1000– 5000 years or even with a longer period. In such areas, it is useful to employ geological inputs like slip rates. In the present paper, the slip rate of the faults is used for the first time, in both direct and indirect approaches in time-independent probabilistic seismic hazard assessment (PSHA), so as to evaluate spectral acceleration (SA). To this end, Kerman region (Southeastern Iran) is selected as an example, and Kerman and Ravar cities located between 54-59° N, and 28. 5-34° E are considered as specific regions to show the effects of slip rate on the seismic hazard. With the purpose of using slip rates in PSHA, indirectly, we have defined a new factor denoted as the fifth factor (K5) to specify the effects of slip rates in calculating spatial distribution function (SDF). On the other hand, the mean annual occurrence rate of each source may be directly calculated based on the slip rate of the faults for a direct use of slip rates in PSHA. In the first time-consuming stage, the slip rates of the faults or fault segments and the seismological data are assembled using available resources and literature. Seismicity parameters in the targeted region are calculated using a unified, homogenized and complete catalog in the method proposed by Kijko and Sellevoll (1992), in which one can consider the magnitude uncertainty and completeness of data in calculations. Through the use of geological maps with scales of 1: 100000 and 1: 250000, and with the experience of previous studies, we have determined 26 potential seismic sources in the region. The comparison of the SDFs calculated based on four factors (K1-K4) and SDFs calculated based on slip rate factor (the fifth, K5) accompanied with the previous four factors indicates that the most differences occurred for sources No. 111 and 121 for the magnitude of 7

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APA: Copy

Dehghan Manshadi, Seyed Hadi, MIRZAEI, NOORBAKHSH, ESKANDARI GHADI, MORTEZA, & SHABANI, ELHAM. (2017). Investigation of the use of slip rate on time-independent seismic hazard macrozonation of Kerman region, west of Lut Block. IRANIAN JOURNAL OF GEOPHYSICS, 11(2 ), 36-62. SID. https://sid.ir/paper/133690/en

Vancouver: Copy

Dehghan Manshadi Seyed Hadi, MIRZAEI NOORBAKHSH, ESKANDARI GHADI MORTEZA, SHABANI ELHAM. Investigation of the use of slip rate on time-independent seismic hazard macrozonation of Kerman region, west of Lut Block. IRANIAN JOURNAL OF GEOPHYSICS[Internet]. 2017;11(2 ):36-62. Available from: https://sid.ir/paper/133690/en

IEEE: Copy

Seyed Hadi Dehghan Manshadi, NOORBAKHSH MIRZAEI, MORTEZA ESKANDARI GHADI, and ELHAM SHABANI, “Investigation of the use of slip rate on time-independent seismic hazard macrozonation of Kerman region, west of Lut Block,” IRANIAN JOURNAL OF GEOPHYSICS, vol. 11, no. 2 , pp. 36–62, 2017, [Online]. Available: https://sid.ir/paper/133690/en

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