en Material Managment Material Managment پژوهشي Research <p> <i> In this paper Semi-Markov models are used to forecast the triple dimensions of next earthquake occurrences. Each earthquake can be investigated in three dimensions including temporal, spatial and magnitude. Semi-Markov models can be used for earthquake forecasting in each arbitrary area and each area can be divided into several zones. In Semi-Markov models each zone can be considered as a state of proposed Semi-Markov model. At first proposed Semi-Markov model is explained to forecast the three mentioned dimensions of next earthquake occurrences. Next, a zoning method is introduced and several algorithms for the validation of the proposed method are also described to obtain the errors of this method. </i></p> Semi-Markov Model, Probabilistic Forecasting Matrix, Forecasting Error, Karakaisis zoning 57 67 http://ijiepr.iust.ac.ir/browse.php?a_code=A-10-1-7&slc_lang=en&sid=1 R. Sadeghian rsadeghian@basu.ac.ir 18003194753284600287 18003194753284600287 No G.R. Jalali-Naini 18003194753284600288 18003194753284600288 No J. Sadjadi Sjsadjadi@iust.ac.ir 18003194753284600289 18003194753284600289 Yes N. Hamidi Fard 18003194753284600290 18003194753284600290 No