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Ανάλυση σεισμικής δραστηριότητας στη Δυτική Κρήτη και ανάδειξη περιοχών κατάλληλων για ανέγερση έργων μεγάλης κλίμακας με χρήση GIS

Dimitrakis Vasileios

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Summary

The Seismic phenomenon and the natural, social and economic consequences that it infers, is a field of continuous and intensive research especially in areas with intense seismic activity such as Greece. The present study intends to highlight the vast potential of using the geographic information systems (GIS) in the study of the seismic phenomenon and its associated aspects. In addition, it presents the key-role that GIS can pay in the process of implementing measures to mitigate the ramifications, environmental or not, that are being involved in the event of a natural disaster.A brief overview over the general possibilities and applications of GIS is provided followed by the basic principles of seismology and the attenuation equations that are being used in the present framework. The area of interest (Western Crete) which practically consists of the prefectures of Chania and Rethymno is therefore presented as is the entire GIS data used to complete the goals of this study.An analysis of the seismic activity is then conducted using not only geo-spatial (through the GIS) but also statistical tools. Many aspects of the seismic activity are being investigated such as the density and depth of the seismic events, the maximum observed ground acceleration etc. Moreover, suitable areas are being located which fulfill certain criteria, considering the current institutional frame, and hence exhibit safety in case of a strong ground motion seismic event. Various maps and graphs have been created, that depict the results of the afore-mentioned objectives, which are analyzed ad hoc in every section. The findings and results of this framework indicate that it can form a basis for future research either by including a larger territory or by providing guidance and interacting in the process of decision-making when it comes to protection from natural causes.

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