Analysis and Routing of Basic Parameters of Tasuj Earthquake (April 2013, Northwest of Iran) with an Emphasis on Geodetic Data, Foreshocks and Large Aftershocks

Abstract In the science of seismology, issues such as the study of tectonic seismic maps and the identification of the behavioural pattern of pre-earthquakes and aftershocks are among the cases that have been proposed as the basis of applied geological studies in recent decades. Accordingly, numerous studies and researches in this field have been carried out in different regions of the world. However, the results of these studies so far have not been able to meet the needs of this field in a practical and practical way, and in this regard, there is a need to provide practical approaches in this field. In order to realize this approach, there is a need for specialized research and case studies in this field in order to be able to present studies on earthquake risk reduction in an institutionalized and practical way by identifying practical patterns. In this study, the basis of the case study, considering the special characteristics of Tasuj earthquake as one of the important earthquakes according to the basic patterns that can be provided in this field for this earthquake has been considered. Also geodetic analysis of Tasuj fault and the other faults studied for estimation of accuracy this analysis for prediction of earthquake. The results of this study indicate that the fault causing the Tasuj earthquake, contrary to what is presented in the fault map of the region and previous reports and articles, is of the strike-slip type, which should be corrected. Also, the analysis of the behavioural pattern of geodetic data, foreshocks and aftershocks as a precursor shows that these patterns can be used in predicting major earthquakes and large aftershocks. To predict the time of large aftershocks in this study, three phases have been used, which are based on changes in depth to magnitude, changes in seismic quiescence to magnitude and depth changes.