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1

Mantle dynamics beneath Greece from SKS and PKS seismic anisotropy study

Kaviris G., Fountoulakis I., Spingos I., Millas C., Papadimitriou P., Drakatos G.

Acta Geophysica

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2018

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Vol. 66, no. 6

1341--1357

EN

SKS and PKS splitting parameters were determined in the broader Greek region using data from 45 stations of the Hellenic Unified Seismological Network and the Kandilli Observatory and Earthquake Research Institute, utilizing teleseismic events that occurred between 2010 and 2017. Data were processed for shear-wave splitting with the Minimum Energy Method that was considered the optimal. The results generally confirm the existence of anisotropic zonation in the Hellenic subduction system, with alternating trench-normal and trench-parallel directions. The zonation is attributed to the upper and lower olivine fabric layers that can, potentially, be present in the subduction zone. At the edges of this zone, two possible toroidal flow cases have been identified, implying the existence of tears that allow the inflow of asthenospheric material in the mantle wedge. The high number of null measurements in the KZN and XOR stations indicates a possible anisotropic transition zone between the fore-arc and back-arc areas. SKS and PKS splitting results are jointly interpreted, given that they yield similar values in most cases.

2

Monitoring of active faults along the Strouma fault zone, SW Bulgaria

Dobrev N., Frangov G., Drakatos G.

Reports on Geodesy

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2006

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z. 5/80

195--198

3

Local geodynamic researches in Sudetes and the Mediterranean Region

Cacoń S., Kontny B., Bosy J., Cello G., Piccardi L, Tondi E., Drakatos G., Ganas A.

Reports on Geodesy

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2006

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z. 4/79

333-346

EN

The general characteristics of local tectonic movements studies basing on the self-developed monitoring system are presented in the paper. The system has been installed on some selected objects in the Sudetes (e.g. "Snieznik Massif and "Dobromierz") and in the Mediterranean basin ("Gargano" and "Norcia" in Italy, "Kaparelli" in Greece). These research areas are located in zones characterised with different magnitudes of recent tectonic activity. The main attention is given to organisation standards of the research network and monitoring of movements using GPS. The accuracy analysis of repeated GPS observations with respect to tectonic movements detection is also presented.

4

Local geodynamic researches in Sudetes and the Mediterranean Region

Cacoń S., Kontny B., Bosy J., Cello G., Piccardi L., Tondi E., Drakatos G., Ganas A.

Reports on Geodesy

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2005

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z. 2/73

231-244

EN

The general characteristics of local tectonic movements studies basing on the selfdeveloped monitoring system are presented in the paper. The system has been installed on some selected objects in the Sudetes ("Snieznik Massif" and "Dobromierz") and in the Mediterranean basin ("Gargano" and "Norcia" in Italy, "Kaparelli" in Greece).These research areas are located in zones characterised with different magnitudes of recent tectonic activity and monitoring of movements using GPS. The accuracy analysis of repeated GPS observations with respect to tectonic movements detection is also presented.