A projekt kereteben Magyarorszag fiatal deformaciojat es felszinfejlődeset vizsgaltuk. Altalanos ervenyű megfigyelesunk szerint hazankban jelenleg is aktiv tektonikai folyamatok zajlanak, amelyek megertese es kvantitativ jellemzese nem csak tudomanyos feladat, hanem a tarsadalmi kihatasokat tekintve is kiemelkedő fontossagu. Geofizikai adatrendszerek egyuttes szerkezeti elemzese kimutatta, hogy a terseg jelenkori deformacioja alapvetően egykori toresvonalak ismetelt felujulasahoz kotődik. A szerkezetek bonyolult geometriaval rendelkező nyirasi ovekbe rendeződnek, jellemzően KEK-NyDNy-i csapassal. Az aljzat szerkezeti felepitesehez igazodo fiatal szerkezetek ismetelt (szeizmo)tektonikus felujulasa ismerhető fel. Geokronologiai vizsgalati eredmenyeink segitsegevel előrelepest tettunk a negyedidőszaki vertikalis keregmozgas es felszinfejlődes rekonstrualasaban. A Dunantulra meghatarozott kiemelkedesi es lepusztulasi ratak 0,1-2 mm/ev ertekek kozott valtoznak. Hasonlo sebessegűek az űrgeodeziai adatok alapjan becsult horizontalis keregmozgasok is. Aktiv tektonika es hidrografia kapcsolatanak vizsgalata alapjan kiderult, hogy a jelenkori differencialt fuggőleges keregmozgasok alapvetően befolyasoljak a vizfolyasok geometriai viszonyait. A medenceinverzio analog modellezesi eredmenyei azt mutatjak, hogy a Pannon-medence elsőrendű geomorfologiai habitusa kielegitően magyarazhato a litoszfera nagyleptekű gyűrődesevel. | The project aimed at the investigation of neotectonic deformation and surface evolution in Hungary. In general, it is recognised that the study area is characterised by active tectonic processes. The understanding and quantification of these processes represent a major scientific challenge and is of key importance considering their societal impact. The joint analysis of various geophysical datasets indicates that present-day deformation is mainly related to the reactivation of pre-existing faults. These faults are aligned in ENE-WSW oriented shear zones with rather complex internal geometry. These fracture systems are prone to repeated reactivation in the future, as also manifested in the morphotectonic habitat of the region. Geochronological studies assist the reconstruction of the Quaternary vertical deformation pattern and the main features of landscape development. Uplift and denudation rates for Transdanubia range between 0.1-2 mm/yr, whereas GPS measurements resulted in similar values for the rate of horizontal deformations. An intimate link between active tectonics and hydrography has been established suggesting that differential vertical surface movements have a major role in influencing the spatial arrangement and geometry of rivers. The results of analogue modelling show that the principle geomorphological character of the Pannonian basin can be adequately explained by large-scale folding of the lithosphere and related vertical deformation.

This paper presents a latest compilation of data on the present-day stress pattern in the Pannonian basin, and its tectonic environment, the Alpine–Dinaric orogens. Extensional formation of the basin system commenced in the early Miocene, whereas its structural reactivation, in the form of gradual basin inversion, has been taking place since Pliocene to recent times. Reconstructed compression and associated horizontal contraction are mainly governed by the convergence between Adria and its buffer, the Alpine belt of orogens. The resulting contemporaneous stress field exhibits important lateral variation resulting in a complex pattern of ongoing tectonic activity. In the Friuli zone of the Southern Alps, where thrust faulting prevails, compression is orthogonal to the strike of the mountain belt. More to the southeast, intense contraction is combined with active strike–slip faulting constituting the dextral Dinaric transpressional corridor. Stresses are transferred far from Adria into the Pannonian basin, and the dominant style of deformation gradually changes from pure contraction through transpression to strike–slip faulting. The importance of late-stage inversion in the Pannonian basin is interpreted in a more general context of structural reactivation of back-arc basins where the sources of compression driving basin inversion are also identified and discussed. The state of recent stress and deformation in the Pannonian basin, particularly in its western and southern part, is governed by the complex interaction of plate boundary and intra-plate forces. The counterclockwise rotation and north-northeast-directed indentation of the Adriatic microplate appears to be of key importance as the dominant source of compression (“Adria-push”). Intra-plate stress sources, such as buoyancy forces associated with an elevated topography, and crustal as well as lithospheric inhomogeneities can also play essential, yet rather local role.

We present data and models for the present-day stress and strain pattern in the Pannonian Basin and surrounding East Alpine-Dinaric orogens. Formation of the Pannonian Basin within the Alpine mountain belt started in the early Miocene, whereas its compressional reactivation has been taking place since late Pliocene-Quaternary time. Basin inversion is related to changes in the stress field from a state of tension during basin formation in the Miocene to a state of compression resulting from the convergence between the Adria microplate and the European plate. Seismicity indicates that deformation is mainly concentrated along Adria's boundaries where pure contraction (thrusting in Friuli and the southeastern Dinarides), often in combination with transform faulting (dextral transpression in the central Dinarides), is predominant. Tectonic stresses and deformation are transferred into the Pannonian Basin, resulting in a complex pattern of ongoing tectonic activity. From the margin of Adria toward the interior of the Pannonian Basin, the dominant style of deformation gradually changes from pure contraction, through transpression, to strike-slip faulting. Shortening in the basin system, documented by earthquake focal mechanisms, global positioning system (GPS) data, and the neotectonic habitat, has led to considerable seismotectonic activity and folding of the lithosphpere. The state of recent stress and deformation in the Pannonian Basin is governed by the interaction of plate-boundary and intraplate forces, which include the counterclockwise rotation and N-NE-directed indentation of the Adria microplate ("Adria-push") as the dominant source of compression, in combination with buoyancy forces associated with differential topography and lithospheric heterogeneities.

In this paper a new compilation of contemporaneous stress data and their tectonic interpretation arepresented for the Pannonian Basin and its tectonic environment, the Alpine-Carpathian-Dinaricorogens. Extensional formation of the basin system started in the Early Miocene, whereas its structuralreactivation has been taking place since Late Miocene to recent times. Basin inversion is related to thechange in the regional stress field from a state of tension to compression. Compression and associateddeformation are mainly governed by the convergence between Adria and its buffer, the Alpine beit oforogens. In the Friuli zone of the Southern Alps, where thrust faulting prevails, compression isorthogonal to the strike of the mountain beit. More to the south-east, intense contraction is combinedwith active strike-slip faulting constituting the dextral Dinaric transpressional corridor. Stresses aretransferred far from Adria into the Pannonian domain. A well-defined spatial variation of the stress fieldresults in a complex pattern of ongoing tectonic activity. From the edges of Adria towards the interior ofthe Pannonian Basin, the dominant style of deformation gradually changes from pure contractionthrough transpression to strike-slip faulting and, locally, transtension. The importance of late-stageinversion in the Pannonian Basin is interpreted in a more general context of structural reactivation ofback-arc basins. Possible sources of compression driving basin inversion are also identified anddiscussed. The state of recent stress and deformation in the Pannonian Basin, particularly in its westernand southern part, are governed by the complex interaction of plate boundary and intraplate forces.Counterclockwise rotation and north-north-east directed indentation of the Adriatic microplate appearto be of key importance as the dominant source of compression (Adria-push). Intraplate stress sources,such as buoyancy forces associated with elevated topography, and crustal as well as lithosphericinhomogeneities can also play essential, yet rather local role.

to be a plane horizontal stress, at least in most cases. The case that one principal stress axis is not vertical; in all probability the tilting or rotating of blocks are occurred expect some special cases (diapirism, magmatism, accretionary prism, ...). These measured raw natural data must be rotated to the original position. In many cases, the angle of rotation is defined by the dip of bedding. If not this correction, the calculations may lead to incorrect results and the computed reduced stress tensor is imaginary and problematic. The rotation to the original position is necessary from case to case. A very instructive example comes from the High Tatra Mts., where a block tilting occurs. The tilting of blocks resulted from the uplift of the High Tatra Mts. All the older deformation stages were rotated into an incorrect orientation and the original N-S compression has been changed to two deformation stages: N-S compression and N-S tension. The computed imaginary extensional tectonic regime caused reorientation of the inverse faults to normal faults during tilting. The tilting and block rotation caused problems with true original orientation of principal stress axis that produced deformation. Knowledge of size and magnitude of block tilting and rotating is important for determination of real orientation of stress tensor during actual deformation stage.