Projects / Programmes source: ARIS

Seizmotektonski model Ljubljanske kotline (Slovene)

Research activity

Code Science Field Subfield
1.06.06  Natural sciences and mathematics  Geology  Regional geology 

Code Science Field
1.05  Natural Sciences  Earth and related Environmental sciences 
Evaluation (rules)
source: COBISS
Researchers (20)
no. Code Name and surname Research area Role Period No. of publicationsNo. of publications
1.  12247  PhD Tomaž Ambrožič  Geodesy  Researcher  2009 - 2012  674 
2.  29607  PhD Jure Atanackov  Geology  Junior researcher  2009 - 2012  237 
3.  16309  PhD Miloš Bavec  Geology  Head  2009 - 2012  426 
4.  19124  PhD Bogomir Celarc  Geology  Researcher  2009 - 2012  325 
5.  11443  PhD Andrej Gosar  Geology  Researcher  2010 - 2012  438 
6.  32050  PhD Petra Jamšek Rupnik  Geology  Junior researcher  2010 - 2012  199 
7.  28456  PhD Mateja Jemec Auflič  Geology  Junior researcher  2009 - 2012  257 
8.  05674  PhD Dušan Kogoj  Geodesy  Researcher  2009 - 2012  950 
9.  07531  PhD Božo Koler  Geodesy  Researcher  2009 - 2012  496 
10.  18166  PhD Marko Komac  Geology  Researcher  2009 - 2012  521 
11.  23500  PhD Klemen Kozmus Trajkovski  Geodesy  Researcher  2010 - 2012  154 
12.  10398  PhD Miran Kuhar  Geodesy  Researcher  2009 - 2012  464 
13.  08255  PhD Miloš Markič  Geology  Researcher  2010 - 2012  210 
14.  21384  PhD Matevž Novak  Geology  Researcher  2009 - 2012  404 
15.  19585  PhD Polona Pavlovčič Prešeren  Geodesy  Researcher  2009 - 2012  315 
16.  07984  MSc Dušan Rajver  Geology  Researcher  2009 - 2012  313 
17.  13531  PhD Simona Savšek  Geodesy  Researcher  2009 - 2012  390 
18.  25481  PhD Oskar Sterle  Geodesy  Researcher  2009 - 2012  180 
19.  15900  PhD Marko Vrabec  Geology  Researcher  2009 - 2012  317 
20.  31990  PhD Lea Žibret  Civil engineering  Junior researcher  2010 - 2012  56 
Organisations (3)
no. Code Research organisation City Registration number No. of publicationsNo. of publications
1.  0215  Geological Survey of Slovenia  Ljubljana  5051410000  10,871 
2.  0792  University of Ljubljana, Faculty of Civil and Geodetic Engineering  Ljubljana  1626981  26,307 
3.  1555  University of Ljubljana, Faculty of Natural Sciences and Engeneering  Ljubljana  1627074  19,929 
Significance for science
The question of recent geodynamics was addressed with a multidisciplinary geologic, geodetic and seismologic approach and by the introduction and use of new research methods in Slovenia (high resolution seismic reflection, GPR, tectonic geomorphology). This contributed to the understanding of active tectonics and seismotectonics in the transitional area between the Southern Alps and the Dinarides as well as to the general scientific advancement of geology and related sciences in Slovenia. Active faults in the Ljubljana Basin were identified and with use of new data also seismotectonically quantified. Important questions from the past were answered: within the basin mostly strike-slip and reverse faults are active, the Vodice topographic scarp is the surface expression of an active reverse fault and that potentially seismically active faults include mostly dextral strike-slip faults and reverse faults. An important novelty is the significantly improved knowledge on regional velocity field. Based on extensive GNSS survey we determined the convergence rate of Adriatic plate with regard to the Eurasia. Besides, we determined the slip rate along the Sava fault and contraction rate within the Posavje folds. This data has been expected by international scientific community for some time and we have provided it within this project for the first time. On the Vodice fault for the first time in Slovenia a geologically recent coseismic surface rupture was proven with the use paleoseismologic tools. This finding puts into new perspective the seismotectonic environment and seismic hazard assessment in Slovenia as well as the placement of the area of Slovenia into the general context of Alpes-Dinarides contact. The research on the Vodice fault is a state of the art case study of an active fault with the following steps: study of archival data, geologic mapping, remote sensing, tectonic–geomorphologic mapping, acquisition and processing of precise geodetic data, succession of geophysical investigations (high resolution seismic refraction and reflection, GPR, ERT) and in the final stage the excavation and detailed analysis of two paleoseismological trenches. The new ESI 2007 earthquake intensity scale was tested on the EMS-98 intensity VII-VIII 1998 Krn earthquake. The spatial distribution of very large, large and medium-sized rock fall events clearly defined an elliptical area, elongated along the seismogenic fault. This research showed the ESI 2007 scale is an effective tool for intensity estimation in sparsely populated mountainous areas, not only for very strong, but also for moderately strong earthquakes which is a worldwide novelty. The microtremor horizontal-to-vertical spectral ratio (HVSR) method, regularly used to determine sediment resonant frequencies was innovatively applied to map the thickness of quaternary fluvial and lacustrine sediments. We confirmed the HVRS method is a time-effective low-cost prospection method for interpolation of the thickness of quaternary sediments between boreholes and geophysical data. To determine the effect of local geological structure on earthquake wave amplification a large HVRS field survey was undertaken. This is one of the first surveys on such a scale worldwide and represents a case study. Due to the rapid development of geodetic science and geodetic tools in the past several decades, new reprocessing and reassessment of existing geodetic data was done with modern techniques in terms of determination of datum parameters, leveling adjustments, transformation, objective assessment of investigated parameters and deformation analysis. Furthermore, in the scope of the geodetic part of the research, a high-quality coordinate system was established and coordinates of measurement points in each individual measurement determined. Both were used as the base for repeated GNSS measurements on high-quality stabilized geodetic points for determination of regional displacement and velocity vectors
Significance for the country
Slovenia is an area of moderate earthquake activity with magnitude 3-4 earthquakes occurring annually, while destructive earthquakes with magnitudes )5 are infrequent. The seismic hazard assessment was mostly based on a few strong historical earthquakes, among which the 1511 magnitude 6.8 Idrija earthquake was the strongest. The large Villach 1348 earthquake was an estimated magnitude 6.4, while the 1895 Ljubljana earthquake was an estimated magnitude 6.1 event. These earthquakes caused significant damage and claimed human lives. The historical scarcity of large events if opposed to the 10 to 1000 ka life span of seismic sources have produced a false sense of the general area being relatively earthquake-safe. The results of this project have shown there are several active faults in the Ljubljana Basin, all potential sources of large and destructive earthquakes, while on several particular faults actual evidence of past destructive events were identified. The significant possibility of destructive earthquakes presents danger for the inhabitants, infrastructure and economy. The results of this project will be used in the future as one of the fundamental inputs in new, future seismic hazard assessment of the Ljubljana Basin and Slovenia as well as the base for future earthquake vulnerability mitigation planning. The new findings from this project will have to be used in future urban planning, earthquake engineering and public awareness programs. With this research, Slovenia has been put on the European map of countries with a high level of seismotectonics and earthquake hazard research.
Most important scientific results Annual report 2009, 2010, 2011, final report, complete report on dLib.si
Most important socioeconomically and culturally relevant results Annual report 2009, 2010, 2011, final report, complete report on dLib.si
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