Oceanographic and Geophysical Surveys

The Ocean Floor Mapping System Using Sea Beam
Sea Floor Seismic Reflection Soundings (Generation of a Local Velocity Model)
Seismic Monitoring (The Generation of a Regional Velocity Model)
Seismic Activity and Monitoring within the Kos - Yali - Nisyros - Tilos Volcanic Field
Gravity and magnetic surveys within the Kos - Yali - Nisyros - Tilos volcanic field
The GPS network

Gravity and magnetic surveys within the Kos - Yali - Nisyros - Tilos volcanic field

The study of density and magnetic fields is very important to the understanding of physical and geological processes in a geodynamically active volcanic field. The detailed measurements of gravity and magnetic fields permits the creation of a 3D density and magnetic susceptibility model of the Nisyros volcano, based on passive and active seismic 3D topography results.

During the project time, one campaign was carried out in the volcanic areas on the islands of Nisyros, Kos, Tilos and Kandeleussa. 208 gravity, magnetic and magnetic susceptibility stations have been selected.

Most of the onshore measurements (Fig. 18) were made along roads, keeping 0.5 km spacing between the stations. The marine gravity data were obtained using the Bodenseewerke-Ascania gravity meter and GPS navigation (Trimble).

Fig. 17 Gravimetric and Differential Global Positioning System (DGPS) station in the Nisyros caldera (location: geothermal well 2). National Kapodistrian University of Athens (NKUA) (Click on image to enlarge).

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