Seismic risk analysis for northern Iraq.

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Research units

  • Fortum Oyj

Abstract

In this study the seismic risks of N Iraq have been evaluated by a probabilistic method. The data contain approx 500 earthquakes which occurred between 1840-1978. The epicentral locations and magnitudes of the included earthquakes have been presented. A linear relationship between magnitude and frequency has been assumed. The attenuation of intensities has been presented as a function of magnitude and epicentral distance. The seismic risk has been calculated for 225 points of the analysed area. The equiseismal maps related to a certain risk level have been plotted by using these point values of intensities, and assuming a linear variation between the points. The significance of the standard deviation of the attenuation law and the strict lower bound intensity has been investigated by sensitivity analyses. The intensity contours related to the annual return period of 50, 100 and 200yr have been presented, and also the intensity contours with an occurrence probability of 10% during 50, 100 and 200yr have been drawn.-from Author

Details

Original languageEnglish
Pages (from-to)605-614
Number of pages10
JournalEARTHQUAKE ENGINEERING AND STRUCTURAL DYNAMICS
Volume10
Issue number4
Publication statusPublished - 1982
MoE publication typeA1 Journal article-refereed

ID: 5583663