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1

Geodynamics at the Alps-Dinarides junction in Slovenia after geological, seismological and geodetic data

Poljak M., Placer L., Živčić M., Bilc A., Vodopivec F.

Reports on Geodesy

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2006

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z. 5/80

487--502

EN

Central Europe Regional Geodynamic Project (CERGOP) in Slovenia includes GPS measurements on 5 sites. Within the first part of the project during years 1994-1997, measurements were performed on one site (Ljubljana), and during the CERGOP-2 extension in years 1999-2005 additional 4 sites were added (Božica, Malija, Snežnik and Mrzlica). However, till now measurements on the three sites only (Ljubljana, Božica and Malija) have been completed. Obtained data show similar sense and amount of horizontal displacements. They exhibit general northward movement of sites at the average velocity of 3 mm/yr. This is in accordance with results obtained from other sites of cirkum-Adriatic region, and it confirms the northward movement of the Adriatic microplate towards the “stable” Eurasian plate. In Slovenia, a northward oriented δ1 tensor have been also obtained from several tens of earthquake fault plane solution. Slight defferences in sense and velocity of displacements among particular sites could be explained by the influence of local structures. In Slovenia, they belong to the Periadriatic dextral shear zone, to the Dinaric dextral shear zone, and to the Transdanubian sinistral shear zone. However, the real dynamics of particular structures, among which some also express co-seismic creep, will be possible to determine only by GPS measurements over a denser network of sites.

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Geodynamics at the Alps - dinarides junction in Slovenia after geological, seismological and geodetic data

Poljak M., Placer L., Zivcic M., Bilc A., Vodopivec F.

Reports on Geodesy

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2006

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z. 4/79

79-95

EN

Central Europe Regional Geodynamic Project (CERGOP) in Slovenia includes GPS measurements on 5 sites. Within the first part of the project during years 1994-1997, measurements were performed on one site (Ljubljana), and during the CERGOP-2 extension in years 1999-2005 additional 4 sites were added (Bozica, Malija, Sneznik and Mrzlica). However, till now measurements on the three sites only (Ljubljana, Bozica and Malija) have been completed. Obtained data show similar sense and amount of horizontal displacements. They exhibit general northward movement of sites at the average velocity of 3 mm/yr. This is in accordance with results obtained from other sites of circum-Adriatic region, and it confirms the northward movement of the Adriatic microplate towards the "stable" Eurasian plate. In Slovenia, a northward oriented Q] tensor have been also obtained from several tens of earthquake fault plane solution. Slight differences in sense and velocity of displacements among particular sites could be explained by the influence of local structures. In Slovenia, they belong to the Periadriatic dextral shear zone, to the Dinaric dextral shear zone, and to the Transdanubian sinistral shear zone. However, the real dynamics of particular structures, among which some also express co-seismic creep, will be possible to determine only by GPS measurements over a denser network of sites.

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Crustal movements in the Eastern Alps and the North Mediterranian, Slovenian part of WP.10.1. Geodynamics at the Alps - Dinarides junction in Slovenia after geological, seismological and geodetic data

Poljak M., Placer L., Zivcic M., Bilc A., Vodopivec V.

Reports on Geodesy

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2006

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z. 1/76

153-168

EN

Central Europe Regional Geodynamic Project (CERGOP) in Slovenia includes GPS measurements on 5 sites. Within the first part of the project during years 1994-1997, measurements were performed on one site (Ljubljana), and during the CERGOP-2 extension in years 1999-2005 additional 4 sites were added (Bozica, Malija, Sneznik and Mrzlica). However, till now measurements on the three sites only (Ljubljana, Bozica and Malija) have been completed. Obtained data show similar sense and amount of horizontal displacements. They exhibit general northward movement of sites at the average velocity of 3 mm/yr. This is in accordance with results obtained from other sites of circum-Adriatic region, and it confirms the northward movement of the Adriatic microplate towards the "stable" Eurasian plate. In Slovenia, a northward oriented Ol tensor have been also obtained from several tens of earthquake fault pIane solution. Slight differences in sense and velocity of displacements among particular sites could be explained by the influence of local structures. In Slovenia, they belong to the Periadriatic dextral shear zone, to the Dinaric dextral shear zone, and tothe Transdanubian sinistraI shear zone. However, the real dynamics of particular structures, among which some also express co-seismic creep, will be possible to determine only by GPS measurements over a den ser network of sites.