Summary:
This PhD thesis focuses on the study of the relation between the initial
impoundment of water reservoirs and the regional seismicity in the two areas of
Polyfyto, Sfikia, Asomata and Pournari dams.
Geologic and tectonic maps of the study areas were composed on GIS environment
and the seismic events recorded by local networks were relocated. The regional
and local seismicity, before and after initial filling, was studied and focal
mechanisms of the larger seismic events were calculated. Seismic cross sections
and b-values of the identified seismic sequences were calculated for
earthquakes with M3.5. The Coulomb stress changes methodology was applied and
spatial distribution of static stress changes was determined for the Pournari
dam area. The latter aimed to examine any probable correlation between the two
major seismic events (M5.5, M4.7) recorded in the region of Pournari dam.
The relationship between seismicity and changes in water level of the studied
lakes indicated that, in general, the variations in water filling, due to
several factors, are more likely to trigger or accelerate seismic activity in
these two areas.
Keywords:
Reservoir Induced seismicity, Coulomb stress change, Focal Mechanisms, Seismotectonic, Reservoir Triggering Seismicity
